@nativescript/core

@nativescript/core

Version 8.8.6
Published 2 months ago
25.2 MB
7 dependencies
Apache-2.0 license

Install

npm i @nativescript/core

yarn add @nativescript/core

pnpm add @nativescript/core

Overview

A JavaScript library providing an easy to use api for interacting with iOS and Android platform APIs.

Index

Variables

variable addCss

const addCss: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.addCss()

variable android

const android: AndroidApplication;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.android

variable androidDynamicElevationOffsetProperty

const androidDynamicElevationOffsetProperty: CssProperty<Style, number>;

variable androidElevationProperty

const androidElevationProperty: CssProperty<Style, number>;

variable AnimationCurve

const AnimationCurve: typeof CoreTypes.AnimationCurve;

Deprecated
Use CoreTypes.AnimationCurve instead.

variable Application

const Application: ApplicationCommon;

variable autocapitalizationTypeProperty

const autocapitalizationTypeProperty: Property<
    EditableTextBase,
    CoreTypes.AutocapitalizationInputType
>;

variable autocorrectProperty

const autocorrectProperty: Property<EditableTextBase, boolean>;

variable backgroundColorProperty

const backgroundColorProperty: CssAnimationProperty<Style, Color>;

variable backgroundEvent

const backgroundEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.backgroundEvent

variable backgroundImageProperty

const backgroundImageProperty: CssProperty<Style, string>;

variable backgroundInternalProperty

const backgroundInternalProperty: CssProperty<Style, Background>;

variable backgroundPositionProperty

const backgroundPositionProperty: CssProperty<Style, string>;

variable backgroundProperty

const backgroundProperty: ShorthandProperty<Style, string>;

variable backgroundRepeatProperty

const backgroundRepeatProperty: CssProperty<Style, CoreTypes.BackgroundRepeatType>;

variable backgroundSizeProperty

const backgroundSizeProperty: CssProperty<Style, string>;

variable borderBottomColorProperty

const borderBottomColorProperty: CssProperty<Style, Color>;

variable borderBottomLeftRadiusProperty

const borderBottomLeftRadiusProperty: CssProperty<Style, CoreTypes.LengthType>;

variable borderBottomRightRadiusProperty

const borderBottomRightRadiusProperty: CssProperty<Style, CoreTypes.LengthType>;

variable borderBottomWidthProperty

const borderBottomWidthProperty: CssProperty<Style, CoreTypes.LengthType>;

variable borderColorProperty

const borderColorProperty: ShorthandProperty<Style, string | Color>;

variable borderLeftColorProperty

const borderLeftColorProperty: CssProperty<Style, Color>;

variable borderLeftWidthProperty

const borderLeftWidthProperty: CssProperty<Style, CoreTypes.LengthType>;

variable borderRadiusProperty

const borderRadiusProperty: ShorthandProperty<
    Style,
    string | number | CoreTypes.LengthDipUnit | CoreTypes.LengthPxUnit
>;

variable borderRightColorProperty

const borderRightColorProperty: CssProperty<Style, Color>;

variable borderRightWidthProperty

const borderRightWidthProperty: CssProperty<Style, CoreTypes.LengthType>;

variable borderTopColorProperty

const borderTopColorProperty: CssProperty<Style, Color>;

variable borderTopLeftRadiusProperty

const borderTopLeftRadiusProperty: CssProperty<Style, CoreTypes.LengthType>;

variable borderTopRightRadiusProperty

const borderTopRightRadiusProperty: CssProperty<Style, CoreTypes.LengthType>;

variable borderTopWidthProperty

const borderTopWidthProperty: CssProperty<Style, CoreTypes.LengthType>;

variable borderWidthProperty

const borderWidthProperty: ShorthandProperty<
    Style,
    string | number | CoreTypes.LengthDipUnit | CoreTypes.LengthPxUnit
>;

variable clipPathProperty

const clipPathProperty: CssProperty<Style, string>;

variable colorProperty

const colorProperty: InheritedCssProperty<Style, Color>;

variable CSSHelper

const CSSHelper: {
    createSelector: typeof createSelector;
    SelectorCore: typeof SelectorCore;
    SimpleSelector: typeof SimpleSelector;
    InvalidSelector: typeof InvalidSelector;
    UniversalSelector: typeof UniversalSelector;
    TypeSelector: typeof TypeSelector;
    ClassSelector: typeof ClassSelector;
    AttributeSelector: typeof AttributeSelector;
    PseudoClassSelector: typeof PseudoClassSelector;
    SimpleSelectorSequence: typeof SimpleSelectorSequence;
    Selector: typeof Selector;
    RuleSet: typeof RuleSet;
    SelectorScope: typeof SelectorScope;
    MediaQuerySelectorScope: typeof MediaQuerySelectorScope;
    StyleSheetSelectorScope: typeof StyleSheetSelectorScope;
    fromAstNode: typeof fromAstNode;
    SelectorsMatch: typeof SelectorsMatch;
};

variable Device

const Device: IDevice;

Gets the current device information.

variable Dialogs

const Dialogs: {
    alert: typeof alert;
    confirm: typeof confirm;
    prompt: typeof prompt;
    login: typeof login;
    action: typeof action;
};

Singular rollup for convenience of all dialog methods

variable discardedErrorEvent

const discardedErrorEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.discardedErrorEvent

variable displayedEvent

const displayedEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.displayedEvent

variable editableProperty

const editableProperty: Property<EditableTextBase, boolean>;

variable Enums

const Enums: {
    Accuracy: typeof CoreTypes.Accuracy;
    AndroidActionBarIconVisibility: typeof CoreTypes.AndroidActionBarIconVisibility;
    AndroidActionItemPosition: typeof CoreTypes.AndroidActionItemPosition;
    AnimationCurve: typeof CoreTypes.AnimationCurve;
    AutocapitalizationType: typeof CoreTypes.AutocapitalizationType;
    BackgroundRepeat: typeof CoreTypes.BackgroundRepeat;
    DeviceOrientation: typeof CoreTypes.DeviceOrientation;
    DeviceType: typeof CoreTypes.DeviceType;
    Dock: typeof CoreTypes.Dock;
    FontAttributes: typeof CoreTypes.FontAttributes;
    FontStyle: typeof CoreTypes.FontStyle;
    FontWeight: typeof CoreTypes.FontWeight;
    HorizontalAlignment: typeof CoreTypes.HorizontalAlignment;
    IOSActionItemPosition: typeof CoreTypes.IOSActionItemPosition;
    ImageFormat: typeof CoreTypes.ImageFormat;
    KeyboardType: typeof CoreTypes.KeyboardType;
    NavigationBarVisibility: typeof CoreTypes.NavigationBarVisibility;
    Orientation: typeof CoreTypes.Orientation;
    ReturnKeyType: typeof CoreTypes.ReturnKeyType;
    StatusBarStyle: typeof CoreTypes.StatusBarStyle;
    Stretch: typeof CoreTypes.ImageStretch;
    SystemAppearance: typeof CoreTypes.SystemAppearance;
    TextAlignment: typeof CoreTypes.TextAlignment;
    TextDecoration: typeof CoreTypes.TextDecoration;
    TextTransform: typeof CoreTypes.TextTransform;
    UpdateTextTrigger: typeof CoreTypes.UpdateTextTrigger;
    VerticalAlignment: typeof CoreTypes.VerticalAlignment;
    Visibility: typeof CoreTypes.Visibility;
    WhiteSpace: typeof CoreTypes.WhiteSpace;
};

Deprecated
Use CoreTypes instead. Enums will be removed in 9.0

variable exitEvent

const exitEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.exitEvent

variable fontFamilyProperty

const fontFamilyProperty: InheritedCssProperty<Style, string>;

variable fontInternalProperty

const fontInternalProperty: InheritedCssProperty<Style, Font>;

variable fontScaleChangedEvent

const fontScaleChangedEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.fontScaleChangedEvent

variable fontScaleInternalProperty

const fontScaleInternalProperty: InheritedCssProperty<Style, number>;

variable fontSizeProperty

const fontSizeProperty: InheritedCssProperty<Style, number>;

variable fontStyleProperty

const fontStyleProperty: InheritedCssProperty<Style, FontStyleType>;

variable fontVariationSettingsProperty

const fontVariationSettingsProperty: InheritedCssProperty<
    Style,
    FontVariationSettingsType[]
>;

variable fontWeightProperty

const fontWeightProperty: InheritedCssProperty<Style, FontWeightType>;

variable foregroundEvent

const foregroundEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.foregroundEvent

variable getCssFileName

const getCssFileName: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.getCssFileName()

variable getMainEntry

const getMainEntry: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.getMainEntry()

variable getNativeApplication

const getNativeApplication: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.getNativeApplication()

variable getResources

const getResources: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.getResources()

variable getRootView

const getRootView: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.getRootView()

variable hasLaunched

const hasLaunched: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.hasLaunched()

variable hasListeners

const hasListeners: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.hasListeners()

variable heightProperty

const heightProperty: CssAnimationProperty<Style, CoreTypes.PercentLengthType>;

variable hintProperty

const hintProperty: Property<EditableTextBase, string>;

variable horizontalAlignmentProperty

const horizontalAlignmentProperty: CssProperty<
    Style,
    CoreTypes.HorizontalAlignmentType
>;

variable inBackground

const inBackground: boolean;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.inBackground

variable ios

const ios: iOSApplication;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.ios

variable isAndroid

const isAndroid: boolean;

Gets a value indicating if the app is running on the Android platform.

variable isIOS

const isIOS: boolean;

Gets a value indicating if the app is running on the iOS platform.

variable isUserInteractionEnabledProperty

const isUserInteractionEnabledProperty: Property<View, boolean>;

variable keyboardTypeProperty

const keyboardTypeProperty: Property<EditableTextBase, CoreTypes.KeyboardInputType>;

variable launchEvent

const launchEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.launchEvent

variable letterSpacingProperty

const letterSpacingProperty: CssProperty<Style, number>;

variable lineHeightProperty

const lineHeightProperty: CssProperty<Style, number>;

variable loadAppCss

const loadAppCss: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.loadAppCss()

variable lowMemoryEvent

const lowMemoryEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.lowMemoryEvent

variable marginBottomProperty

const marginBottomProperty: CssProperty<Style, CoreTypes.PercentLengthType>;

variable marginLeftProperty

const marginLeftProperty: CssProperty<Style, CoreTypes.PercentLengthType>;

variable marginProperty

const marginProperty: ShorthandProperty<
    Style,
    | string
    | number
    | CoreTypes.LengthDipUnit
    | CoreTypes.LengthPxUnit
    | CoreTypes.LengthPercentUnit
>;

variable marginRightProperty

const marginRightProperty: CssProperty<Style, CoreTypes.PercentLengthType>;

variable marginTopProperty

const marginTopProperty: CssProperty<Style, CoreTypes.PercentLengthType>;

variable maxLengthProperty

const maxLengthProperty: Property<EditableTextBase, number>;

variable minHeightProperty

const minHeightProperty: CssProperty<
    Style,
    number | CoreTypes.LengthDipUnit | CoreTypes.LengthPxUnit
>;

variable minWidthProperty

const minWidthProperty: CssProperty<
    Style,
    number | CoreTypes.LengthDipUnit | CoreTypes.LengthPxUnit
>;

variable notify

const notify: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.notify()

variable off

const off: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.off()

variable on

const on: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.on()

variable opacityProperty

const opacityProperty: CssAnimationProperty<Style, number>;

variable orientation

const orientation: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.orientation()

variable orientationChangedEvent

const orientationChangedEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.orientationChangedEvent

variable paddingBottomProperty

const paddingBottomProperty: CssProperty<Style, CoreTypes.LengthType>;

variable paddingLeftProperty

const paddingLeftProperty: CssProperty<Style, CoreTypes.LengthType>;

variable paddingProperty

const paddingProperty: ShorthandProperty<
    Style,
    string | number | CoreTypes.LengthDipUnit | CoreTypes.LengthPxUnit
>;

variable paddingRightProperty

const paddingRightProperty: CssProperty<Style, CoreTypes.LengthType>;

variable paddingTopProperty

const paddingTopProperty: CssProperty<Style, CoreTypes.LengthType>;

variable placeholderColorProperty

const placeholderColorProperty: CssProperty<Style, Color>;

variable platformNames

const platformNames: { android: string; ios: string; visionos: string };

variable resetRootView

const resetRootView: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.resetRootView()

variable resumeEvent

const resumeEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.resumeEvent

variable returnKeyTypeProperty

const returnKeyTypeProperty: Property<
    EditableTextBase,
    CoreTypes.ReturnKeyButtonType
>;

variable rotateProperty

const rotateProperty: CssAnimationProperty<Style, number>;

variable run

const run: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.run()

variable scaleXProperty

const scaleXProperty: CssAnimationProperty<Style, number>;

variable scaleYProperty

const scaleYProperty: CssAnimationProperty<Style, number>;

variable setAutoSystemAppearanceChanged

const setAutoSystemAppearanceChanged: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.setAutoSystemAppearanceChanged()

variable setCssFileName

const setCssFileName: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.setCssFileName()

variable setMaxRefreshRate

const setMaxRefreshRate: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.setMaxRefreshRate()

variable setResources

const setResources: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.setResources()

variable suspended

const suspended: boolean;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.suspended

variable suspendEvent

const suspendEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.suspendEvent

variable systemAppearance

const systemAppearance: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.systemAppearance()

variable systemAppearanceChanged

const systemAppearanceChanged: any;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.systemAppearanceChanged()

variable systemAppearanceChangedEvent

const systemAppearanceChangedEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.systemAppearanceChangedEvent

variable textAlignmentProperty

const textAlignmentProperty: InheritedCssProperty<
    Style,
    CoreTypes.TextAlignmentType
>;

variable textDecorationProperty

const textDecorationProperty: CssProperty<Style, CoreTypes.TextDecorationType>;

variable textOverflowProperty

const textOverflowProperty: CssProperty<Style, CoreTypes.TextOverflowType>;

variable textShadowProperty

const textShadowProperty: CssProperty<Style, ShadowCSSValues>;

variable textStrokeProperty

const textStrokeProperty: CssProperty<Style, StrokeCSSValues>;

variable textTransformProperty

const textTransformProperty: CssProperty<Style, CoreTypes.TextTransformType>;

variable translateXProperty

const translateXProperty: CssAnimationProperty<Style, number>;

variable translateYProperty

const translateYProperty: CssAnimationProperty<Style, number>;

variable uncaughtErrorEvent

const uncaughtErrorEvent: string;

Deprecated
Deep imports into the Application module are deprecated and will be removed in a future release. Use the Application class imported from "@nativescript/core" instead:
import { Application } from "@nativescript/core"; Application.uncaughtErrorEvent

variable unsetValue

const unsetValue: any;

Value specifying that Property should be set to its initial value.

variable updateTextTriggerProperty

const updateTextTriggerProperty: Property<
    EditableTextBase,
    CoreTypes.UpdateTextTriggerType
>;

variable verticalAlignmentProperty

const verticalAlignmentProperty: CssProperty<Style, CoreTypes.VerticalAlignmentType>;

variable visibilityProperty

const visibilityProperty: CssProperty<Style, CoreTypes.VisibilityType>;

variable whiteSpaceProperty

const whiteSpaceProperty: CssProperty<Style, CoreTypes.WhiteSpaceType>;

variable widthProperty

const widthProperty: CssAnimationProperty<Style, CoreTypes.PercentLengthType>;

variable zeroLength

const zeroLength: CoreTypes.LengthType;

variable zIndexProperty

const zIndexProperty: CssProperty<Style, number>;

Functions

function action

action: {
    (
        message: string,
        cancelButtonText: string,
        actions: Array<string>
    ): Promise<string>;
    (options: ActionOptions): Promise<string>;
};

The action() method displays a action box that prompts the visitor to choose some action.
Parameter message
The text to display in the dialog box.
Parameter cancelButtonText
The text to display in the cancel button.
Parameter actions
List of available actions.
The action() method displays a action box that prompts the visitor to choose some action.
Parameter options
The options for the dialog box.

function addTaggedAdditionalCSS

addTaggedAdditionalCSS: (cssText: string, tag?: string | Number) => boolean;

function addWeakEventListener

addWeakEventListener: (
    source: Observable,
    eventName: string,
    handler: (eventData: EventData) => void,
    target: any
) => void;

Attaches a WeakEventListener.
Parameter source
Observable class which emits the event.
Parameter eventName
The event name.
Parameter handler
The function which should be called when event occurs.
Parameter target
Subscriber (target) of the event listener. It will be used as a thisArg in the handler function.

function alert

alert: {
    (message: string | number | boolean): Promise<void>;
    (options: AlertOptions): Promise<void>;
};

The alert() method displays an alert box with a specified message.
Parameter message
Specifies the text to display in the alert box.
The alert() method displays an alert box with a specified message.
Parameter options
Specifies the options for the alert box.

function animationTimingFunctionConverter

animationTimingFunctionConverter: (value: string) => any;

function booleanConverter

booleanConverter: (v: string | boolean) => boolean;

function confirm

confirm: {
    (message: string): Promise<boolean>;
    (options: ConfirmOptions): Promise<boolean>;
};

The confirm() method displays a dialog box with a specified message.
Parameter message
Specifies the text to display in the confirm box.
The confirm() method displays a dialog box with a specified message.
Parameter options
Specifies the options for the confirm box.

function CSSType

CSSType: (type: string) => ClassDecorator;

Specifies the type name for the instances of this View class, that is used when matching CSS type selectors.
Usage:
@CSSType("Button") class Button extends View { }
Internally the decorator set Button.prototype.cssType = "Button".
Parameter type
The type name, e. g. "Button", "Label", etc.

function eachDescendant

eachDescendant: (
    view: ViewBaseDefinition,
    callback: (child: ViewBaseDefinition) => boolean
) => void;

Iterates through all child views (via visual tree) and executes a function.
Parameter view
Starting view (parent container).
Parameter callback
A function to execute on every child. If function returns false it breaks the iteration.

function fromObject

fromObject: (source: any) => Observable;

Creates an Observable instance and sets its properties according to the supplied JavaScript object. param obj - A JavaScript object used to initialize nativescript Observable instance.

function fromObjectRecursive

fromObjectRecursive: (source: any) => Observable;

Creates an Observable instance and sets its properties according to the supplied JavaScript object. This function will create new Observable for each nested object (expect arrays and functions) from supplied JavaScript object. param obj - A JavaScript object used to initialize nativescript Observable instance.

function getAncestor

getAncestor: (
    view: ViewBaseDefinition,
    criterion: string | { new (): any }
) => ViewBaseDefinition;

Gets an ancestor from a given type.
Parameter view
Starting view (child view).
Parameter criterion
The type of ancestor view we are looking for. Could be a string containing a class name or an actual type. Returns an instance of a view (if found), otherwise undefined.

function getCurrentPage

getCurrentPage: () => Page;

function getFileAccess

getFileAccess: () => FileSystemAccess;

Returns FileSystemAccess, a shared singleton utility class to provide methods to access and work with the file system. This is used under the hood of all the file system apis in @nativescript/core and provided as a lower level convenience if needed.
Returns
FileSystemAccess

function getRootLayout

getRootLayout: () => RootLayout;

function getTransformedText

getTransformedText: (
    text: string,
    textTransform: CoreTypes.TextTransformType
) => string;

function getViewById

getViewById: (view: ViewBaseDefinition, id: string) => ViewBaseDefinition;

Gets a child view by id.
Parameter view
The parent (container) view of the view to look for.
Parameter id
The id of the view to look for. Returns an instance of a view (if found), otherwise undefined.

function isEmbedded

isEmbedded: () => boolean;

Whether the app is embedded into a host project or standalone project

login: {
    (
        message: string,
        userNameHint?: string,
        passwordHint?: string,
        userName?: string,
        password?: string
    ): Promise<LoginResult>;
    (
        message: string,
        userNameHint?: string,
        passwordHint?: string
    ): Promise<LoginResult>;
    (options: LoginOptions): Promise<LoginResult>;
};

The login() method displays a login dialog box that prompts the visitor for user name and password.
Parameter message
The text to display in the dialog box.
Parameter userNameHint
The default text to display as a hint in the username input. Optional.
Parameter passwordHint
The default text to display as a hint in the password input. Optional.
Parameter userName
The default text to display in the user name input box. Optional.
Parameter password
The default text to display in the password input box. Optional.
The login() method displays a login dialog box that prompts the visitor for user name and password.
Parameter message
The text to display in the dialog box.
Parameter userNameHint
The default text to display as a hint in the username input. Optional.
Parameter passwordHint
The default text to display as a hint in the password input. Optional.
The login() method displays a login dialog box that prompts the visitor for user name and password.
Parameter options
The options for the dialog box.

function makeParser

makeParser: <T>(
    isValid: (value: any) => boolean,
    allowNumbers?: boolean
) => (value: any) => T;

function makeValidator

makeValidator: <T>(...values: T[]) => (value: any) => value is T;

function parseCSSShadow

parseCSSShadow: (value: string) => ShadowCSSValues;

Parse a string into ShadowCSSValues Supports any valid css box/text shadow combination.
inspired by https://github.com/jxnblk/css-box-shadow/blob/master/index.js (MIT License)
Parameter value

function parseKeyframeDeclarations

parseKeyframeDeclarations: (
    unparsedKeyframeDeclarations: KeyframeDeclaration[]
) => KeyframeDeclaration[];

function profile

profile: {
    (name?: string): MethodDecorator;
    <F extends Function>(fn: F): F;
    <F extends Function>(name: string, fn: F): F;
    <T>(
        target: Object,
        propertyKey: string | symbol,
        descriptor: TypedPropertyDescriptor<T>
    ): void | TypedPropertyDescriptor<T>;
    (): any;
};

Method decorator factory. It will intercept the method call and start and pause a timer before and after the method call. Works only if profiling is enabled.
Parameter name
Name of the timer which will be used for method calls. If not provided - the name of the method will be used.
Function factory. It will intercept the function call and start and pause a timer before and after the function call. Works only if profiling is enabled. Works only if profiling is enabled.
Parameter fn
The function to wrap. Uses the function name to track the times.
Function factory. It will intercept the function call and start and pause a timer before and after the function call. Works only if profiling is enabled.
Parameter name
The name used to track calls and times.
Parameter fn
The function to wrap.
Method decorator. It will intercept the method calls and start and pause a timer before and after the method call. Works only if profiling is enabled.

function profilingDisable

profilingDisable: () => void;

Disables profiling.

function profilingDumpProfiles

profilingDumpProfiles: () => void;

Prints the timer for all methods instrumented with profile decorator.

function profilingEnable

profilingEnable: (type?: InstrumentationMode) => void;

Enables profiling.
Upon loading of the module it will cache the package.json of the app and check if there is a "profiling" key set, its value can be one of the options available for InstrumentationMode, and if set, enable() will be called in pre app start with the value in the package.json.
An example for an app/package.json enabling the manual instrumentation profiling is:
{ "main": "main.js", "profiling": "timeline" }
Parameter type
Profiling mode to use. - "counters" - Accumulates method call counts and times until dumpProfiles is called and then prints aggregated statistic in the console. This is the default. - "timeline" - Outputs method names along start/end timestamps in the console on the go. - "lifecycle" - Outputs basic non-verbose times for startup, navigation, etc.

function profilingIsRunning

profilingIsRunning: (name: string) => boolean;

Returns true if a timer is currently running.
Parameter name
Name of the timer.
Returns
true is the timer is currently running.

function profilingResetProfiles

profilingResetProfiles: () => void;

Resets the timers for all methods instrumented with profile decorator.

function profilingStart

profilingStart: (name: string) => void;

Starts a timer with a specific name. Works only if profiling is enabled.
Parameter name
Name of the timer.

function profilingStartCPU

profilingStartCPU: (name: string) => void;

Starts android cpu profiling.
Parameter name
Name of the cpu profiling session.

function profilingStop

profilingStop: (name: string) => TimerInfo;

Pauses a timer with a specific name. This will increase call count and accumulate time. Works only if profiling is enabled.
Parameter name
Name of the timer.
Returns
TimerInfo for the paused timer.

function profilingStopCPU

profilingStopCPU: (name: string) => void;

Stops android cpu profiling.
Parameter name
Name of the cpu profiling session.

function profilingTime

profilingTime: () => number;

Gets accurate system timestamp in ms.

function profilingUptime

profilingUptime: () => number;

Gets the uptime of the current process in milliseconds.

function prompt

prompt: {
    (message: string, defaultText?: string): Promise<PromptResult>;
    (options: PromptOptions): Promise<PromptResult>;
};

The prompt() method displays a dialog box that prompts the visitor for input.
Parameter message
The text to display in the dialog box.
Parameter defaultText
The default text to display in the input box. Optional.
The prompt() method displays a dialog box that prompts the visitor for input.
Parameter options
The options for the dialog box.

function PseudoClassHandler

PseudoClassHandler: (...pseudoClasses: string[]) => MethodDecorator;

function querySelectorAll

querySelectorAll: (
    view: ViewBaseDefinition,
    selector: string
) => Array<ViewBaseDefinition>;

Gets a child view by selector.
Parameter view
The parent (container) view of the view to look for.
Parameter selector
The selector of the view to look for. Returns an instance of a view (if found), otherwise undefined.

function removeTaggedAdditionalCSS

removeTaggedAdditionalCSS: (tag: String | Number) => boolean;

function removeWeakEventListener

removeWeakEventListener: (
    source: Observable,
    eventName: string,
    handler: (eventData: EventData) => void,
    target: any
) => void;

Removes a WeakEventListener.
Parameter source
Observable class which emits the event.
Parameter eventName
The event name.
Parameter handler
The function which should be called when event occurs.
Parameter target
Subscriber (target) of the event listener. It will be used as a thisArg in the handler function.

function resolveFileNameFromUrl

resolveFileNameFromUrl: (
    url: string,
    appDirectory: string,
    fileExists: (filepath: string) => boolean,
    importSource?: string
) => string;

function sanitizeModuleName

sanitizeModuleName: (moduleName: string, removeExtension?: boolean) => string;

Helps sanitize a module name if it is prefixed with '~/', '~' or '/'
Parameter moduleName
the name
Parameter removeExtension
whether to remove extension

function setActivityCallbacks

setActivityCallbacks: (activity: any) => void;

function timeConverter

timeConverter: (value: string) => number;

function transformConverter

transformConverter: (text: string) => TransformFunctionsInfo;

Classes

class AbsoluteLayout

class AbsoluteLayout extends LayoutBase {}

A layout that lets you specify exact locations (left/top coordinates) of its children.

method getLeft

static getLeft: (view: View) => CoreTypes.LengthType;

Gets the value of the Left property from a given View.

method getTop

static getTop: (view: View) => CoreTypes.LengthType;

Gets the value of the Top property from a given View.

method setLeft

static setLeft: (view: View, value: CoreTypes.LengthType) => void;

Sets the value of the Left property from a given View.

method setTop

static setTop: (view: View, value: CoreTypes.LengthType) => void;

Sets the value of the Top property from a given View.

class ActionBar

class ActionBar extends View {}

Provides an abstraction over the ActionBar (android) and NavigationBar (iOS).

property actionItems

actionItems: ActionItems;

Gets the collection of action items.

property android

android: AndroidActionBarSettings;

Gets the android specific options of the action bar.

property effectiveContentInsetLeft

effectiveContentInsetLeft: number;

property effectiveContentInsetRight

effectiveContentInsetRight: number;

property flat

flat: boolean;

Removes the shadow/border at the bottom of the ActionBar and removes translucency on iOS. Default false.

property ios

ios: any;

Gets the native iOS [UINavigationBar](https://developer.apple.com/documentation/uikit/uinavigationbar) that represents the user interface for this component. Valid only when running on iOS.

property iosIconRenderingMode

iosIconRenderingMode: 'automatic' | 'alwaysOriginal' | 'alwaysTemplate';

Gets or set the UIImageRenderingMode of the action bar icons in iOS. Defaults to "alwaysOriginal" Valid values are: - automatic - alwaysOriginal - alwaysTemplate

property navigationButton

navigationButton: NavigationButton;

Gets or sets the navigation button (a.k.a. the back button).

property title

title: string;

Gets or sets the action bar title.

property titleView

titleView: View;

Gets or sets the title view. When set - replaces the title with a custom view.

method update

update: () => any;

Updates the action bar.

class ActionItem

class ActionItem extends ViewBase {}

Represents an action item in the action bar.

property actionBar

actionBar: ActionBar;

Gets the action bar that contains the action item.

property actionView

actionView: View;

Gets or sets the custom action view of the action item.

property android

android: AndroidActionItemSettings;

Gets the Android specific options of the action item.

property icon

icon: string;

Gets or sets the icon of the action item.

property ios

ios: IOSActionItemSettings;

Gets the iOS specific options of the action item.

property text

text: string;

Gets or sets the text of the action item.

property visibility

visibility: string;

Gets or sets the visibility of the action item.

method on

on: {
    (eventName: string, callback: (data: EventData) => void): void;
    (event: 'tap', callback: (args: EventData) => void): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when a tap event occurs.

class ActionItems

class ActionItems {}

Represents a collection of ActionItems.

method addItem

addItem: (item: ActionItem) => void;

Adds an item to the collection.
Parameter item
the item to be added

method getItemAt

getItemAt: (index: number) => ActionItem;

Gets an item at a specified index.
Parameter index
The index.

method getItems

getItems: () => Array<ActionItem>;

Gets an array of the current action items in the collection.

method removeItem

removeItem: (item: ActionItem) => void;

Removes an item to the collection.
Parameter item
The item to be removed.

class ActivityIndicator

class ActivityIndicator extends View {}

Represents a UI widget which displays a progress indicator hinting the user for some background operation running.

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/widget/ProgressBar.html) that represents the user interface for this component. Valid only when running on Android OS.

property busy

busy: boolean;

Gets or sets a value indicating whether the widget is currently displaying progress.

property ios

ios: any;

Gets the native iOS [UIActivityIndicatorView](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIActivityIndicatorView_Class/index.html) that represents the user interface for this component. Valid only when running on iOS.

class AndroidApplication

class AndroidApplication extends ApplicationCommon {}

property activityBackPressedEvent

static readonly activityBackPressedEvent: string;

Deprecated
Use Application.android.activityBackPressedEvent instead.

property activityBackPressedEvent

readonly activityBackPressedEvent: string;

property activityCreatedEvent

static readonly activityCreatedEvent: string;

Deprecated
Use Application.android.activityCreatedEvent instead.

property activityCreatedEvent

readonly activityCreatedEvent: string;

property activityDestroyedEvent

static readonly activityDestroyedEvent: string;

Deprecated
Use Application.android.activityDestroyedEvent instead.

property activityDestroyedEvent

readonly activityDestroyedEvent: string;

property activityNewIntentEvent

static readonly activityNewIntentEvent: string;

Deprecated
Use Application.android.activityNewIntentEvent instead.

property activityNewIntentEvent

readonly activityNewIntentEvent: string;

property activityPausedEvent

static readonly activityPausedEvent: string;

Deprecated
Use Application.android.activityPausedEvent instead.

property activityPausedEvent

readonly activityPausedEvent: string;

property activityRequestPermissionsEvent

static readonly activityRequestPermissionsEvent: string;

Deprecated
Use Application.android.activityRequestPermissionsEvent instead.

property activityRequestPermissionsEvent

readonly activityRequestPermissionsEvent: string;

property activityResultEvent

static readonly activityResultEvent: string;

Deprecated
Use Application.android.activityResultEvent instead.

property activityResultEvent

readonly activityResultEvent: string;

property activityResumedEvent

static readonly activityResumedEvent: string;

Deprecated
Use Application.android.activityResumedEvent instead.

property activityResumedEvent

readonly activityResumedEvent: string;

property activityStartedEvent

static readonly activityStartedEvent: string;

Deprecated
Use Application.android.activityStartedEvent instead.

property activityStartedEvent

readonly activityStartedEvent: string;

property activityStoppedEvent

static readonly activityStoppedEvent: string;

Deprecated
Use Application.android.activityStoppedEvent instead.

property activityStoppedEvent

readonly activityStoppedEvent: string;

property backgrounded

readonly backgrounded: boolean;

Deprecated
Use Application.inBackground instead.

property context

readonly context: android.content.Context;

Deprecated
Use Utils.android.getApplicationContext() instead.

property foregroundActivity

readonly foregroundActivity: androidx.appcompat.app.AppCompatActivity;

The currently active (loaded) [android Activity](http://developer.android.com/reference/android/app/Activity.html).
This property is automatically updated upon Activity events.

property nativeApp

readonly nativeApp: android.app.Application;

The [android Application](http://developer.android.com/reference/android/app/Application.html) object instance provided to the init of the module.

property packageName

readonly packageName: string;

Deprecated
Use Utils.android.getPackageName() instead.

property paused

readonly paused: boolean;

Deprecated
Use Application.suspended instead.

property saveActivityStateEvent

static readonly saveActivityStateEvent: string;

Deprecated
Use Application.android.saveActivityStateEvent instead.

property saveActivityStateEvent

readonly saveActivityStateEvent: string;

property startActivity

readonly startActivity: androidx.appcompat.app.AppCompatActivity;

The main (start) Activity for the application.

method getNativeApplication

getNativeApplication: () => android.app.Application;

method getRegisteredBroadcastReceiver

getRegisteredBroadcastReceiver: (
    intentFilter: string
) => android.content.BroadcastReceiver;

Get a registered BroadcastReceiver, then you can get the result code of BroadcastReceiver in onReceiveCallback method.
Parameter intentFilter
A string containing the intent filter.

method on

on: {
    (
        event: 'activityCreated',
        callback: (args: AndroidActivityBundleEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'activityDestroyed',
        callback: (args: AndroidActivityEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'activityStarted',
        callback: (args: AndroidActivityEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'activityPaused',
        callback: (args: AndroidActivityEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'activityResumed',
        callback: (args: AndroidActivityEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'activityStopped',
        callback: (args: AndroidActivityEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'saveActivityState',
        callback: (args: AndroidActivityBundleEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'activityResult',
        callback: (args: AndroidActivityResultEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'activityBackPressed',
        callback: (args: AndroidActivityBackPressedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'activityNewIntent',
        callback: (args: AndroidActivityNewIntentEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'activityRequestPermissions',
        callback: (args: AndroidActivityRequestPermissionsEventData) => void,
        thisArg?: any
    ): void;
};

method registerBroadcastReceiver

registerBroadcastReceiver: (
    intentFilter: string,
    onReceiveCallback: (
        context: android.content.Context,
        intent: android.content.Intent
    ) => void
) => void;

Register a BroadcastReceiver to be run in the main activity thread. The receiver will be called with any broadcast Intent that matches filter, in the main application thread. For more information, please visit 'http://developer.android.com/reference/android/content/Context.html#registerReceiver%28android.content.BroadcastReceiver,%20android.content.IntentFilter%29'
Parameter intentFilter
A string containing the intent filter.
Parameter onReceiveCallback
A callback function that will be called each time the receiver receives a broadcast.

method unregisterBroadcastReceiver

unregisterBroadcastReceiver: (intentFilter: string) => void;

Unregister a previously registered BroadcastReceiver. For more information, please visit 'http://developer.android.com/reference/android/content/Context.html#unregisterReceiver(android.content.BroadcastReceiver)'
Parameter intentFilter
A string containing the intent filter with which the receiver was originally registered.

class Animation

class Animation {}

Defines a animation set.

constructor

constructor(
    animationDefinitions: AnimationDefinition[],
    playSequentially?: boolean
);

property cancel

cancel: () => void;

property isPlaying

isPlaying: boolean;

property play

play: (resetOnFinish?: boolean) => AnimationPromise;

class ApplicationCommon

class ApplicationCommon {}

property android

readonly android: IAndroidApplication;

property AndroidApplication

readonly AndroidApplication: IAndroidApplication;

property autoSystemAppearanceChanged

autoSystemAppearanceChanged: boolean;

Boolean to enable/disable systemAppearanceChanged

property backgroundEvent

readonly backgroundEvent: string;

property cssChangedEvent

readonly cssChangedEvent: string;

property discardedErrorEvent

readonly discardedErrorEvent: string;

property displayedEvent

readonly displayedEvent: string;

property exitEvent

readonly exitEvent: string;

property fontScaleChangedEvent

readonly fontScaleChangedEvent: string;

property foregroundEvent

readonly foregroundEvent: string;

property hasListeners

static hasListeners: (eventName: string) => boolean;

Deprecated
Use Application.android.hasListeners() instead.

property hasListeners

hasListeners: (eventName: string) => boolean;

property inBackground

readonly inBackground: boolean;

property initRootViewEvent

readonly initRootViewEvent: string;

property ios

readonly ios: IiOSApplication;

property iOSApplication

readonly iOSApplication: IiOSApplication;

property launchEvent

readonly launchEvent: string;

property livesyncEvent

readonly livesyncEvent: string;

property loadAppCssEvent

readonly loadAppCssEvent: string;

property lowMemoryEvent

readonly lowMemoryEvent: string;

property mainEntry

protected mainEntry: NavigationEntry;

property notify

static notify: <T = ApplicationEventData>(eventData: T) => void;

Deprecated
Use Application.android.notify() instead.

property notify

notify: <T = ApplicationEventData>(eventData: T) => void;

property off

static off: (eventNames: string, callback?: any, thisArg?: any) => void;

Deprecated
Use Application.android.off() instead.

property off

off: (eventNames: string, callback?: any, thisArg?: any) => void;

property on

static on: {
    (
        eventNames: string,
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'cssChanged',
        callback: (args: CssChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'livesync',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'cssChanged',
        callback: (args: CssChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'launch',
        callback: (args: LaunchEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'displayed',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'suspend',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'resume',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'exit',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'lowMemory',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'uncaughtError',
        callback: (args: UnhandledErrorEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'discardedError',
        callback: (args: DiscardedErrorEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'orientationChanged',
        callback: (args: OrientationChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'systemAppearanceChanged',
        callback: (args: SystemAppearanceChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'fontScaleChanged',
        callback: (args: FontScaleChangedEventData) => void,
        thisArg?: any
    ): void;
};

Deprecated
Use Application.android.on() instead.

property on

on: {
    (
        eventNames: string,
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'cssChanged',
        callback: (args: CssChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'livesync',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'cssChanged',
        callback: (args: CssChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'launch',
        callback: (args: LaunchEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'displayed',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'suspend',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'resume',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'exit',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'lowMemory',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'uncaughtError',
        callback: (args: UnhandledErrorEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'discardedError',
        callback: (args: DiscardedErrorEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'orientationChanged',
        callback: (args: OrientationChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'systemAppearanceChanged',
        callback: (args: SystemAppearanceChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'fontScaleChanged',
        callback: (args: FontScaleChangedEventData) => void,
        thisArg?: any
    ): void;
};

property once

static once: {
    (
        eventNames: string,
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'cssChanged',
        callback: (args: CssChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'livesync',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'cssChanged',
        callback: (args: CssChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'launch',
        callback: (args: LaunchEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'displayed',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'suspend',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'resume',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'exit',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'lowMemory',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'uncaughtError',
        callback: (args: UnhandledErrorEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'discardedError',
        callback: (args: DiscardedErrorEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'orientationChanged',
        callback: (args: OrientationChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'systemAppearanceChanged',
        callback: (args: SystemAppearanceChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'fontScaleChanged',
        callback: (args: FontScaleChangedEventData) => void,
        thisArg?: any
    ): void;
};

Deprecated
Use Application.android.once() instead.

property once

once: {
    (
        eventNames: string,
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'cssChanged',
        callback: (args: CssChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'livesync',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'cssChanged',
        callback: (args: CssChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'launch',
        callback: (args: LaunchEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'displayed',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'suspend',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'resume',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'exit',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'lowMemory',
        callback: (args: ApplicationEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'uncaughtError',
        callback: (args: UnhandledErrorEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'discardedError',
        callback: (args: DiscardedErrorEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'orientationChanged',
        callback: (args: OrientationChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'systemAppearanceChanged',
        callback: (args: SystemAppearanceChangedEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'fontScaleChanged',
        callback: (args: FontScaleChangedEventData) => void,
        thisArg?: any
    ): void;
};

property orientationChangedEvent

readonly orientationChangedEvent: string;

property resumeEvent

readonly resumeEvent: string;

property started

started: boolean;

property suspended

readonly suspended: boolean;

property suspendEvent

readonly suspendEvent: string;

property systemAppearanceChangedEvent

readonly systemAppearanceChangedEvent: string;

property uncaughtErrorEvent

readonly uncaughtErrorEvent: string;

method addCss

addCss: (cssText: string, attributeScoped?: boolean) => void;

method applyCssClass

applyCssClass: (
    rootView: View,
    cssClasses: string[],
    newCssClass: string,
    skipCssUpdate?: boolean
) => void;

Applies the the newCssClass to the rootView and removes all other css classes from cssClasses previously applied to the rootView.
Parameter rootView
Parameter cssClasses
Parameter newCssClass
Parameter skipCssUpdate

method createRootView

createRootView: (
    view?: View,
    fireLaunchEvent?: boolean,
    additionalLanchEventData?: any
) => View;

method getCssFileName

getCssFileName: () => string;

Gets css file name for the application.

method getMainEntry

getMainEntry: () => NavigationEntry;

Returns
The main entry of the application

method getNativeApplication

getNativeApplication: () => any;

method getOrientation

protected getOrientation: () => 'portrait' | 'landscape' | 'unknown';

method getResources

getResources: () => any;

Get application level static resources.

method getRootView

getRootView: () => View;

method getSystemAppearance

protected getSystemAppearance: () => 'dark' | 'light' | null;

method hasLaunched

hasLaunched: () => boolean;

method initRootView

initRootView: (rootView: View) => void;

method loadAppCss

loadAppCss: () => void;

Loads immediately the app.css. By default the app.css file is loaded shortly after "loaded". For the Android snapshot the CSS can be parsed during the snapshot generation, as the CSS does not depend on runtime APIs, and loadAppCss will be called explicitly.

method notifyLaunch

protected notifyLaunch: (additionalLanchEventData?: any) => View | null;

method orientation

orientation: () => 'portrait' | 'landscape' | 'unknown';

method orientationChanged

orientationChanged: (
    rootView: View,
    newOrientation: 'portrait' | 'landscape' | 'unknown'
) => void;

method resetRootView

resetRootView: (entry?: NavigationEntry | string) => void;

method run

run: (entry?: string | NavigationEntry) => void;

method setAutoSystemAppearanceChanged

setAutoSystemAppearanceChanged: (value: boolean) => void;

enable/disable systemAppearanceChanged

method setCssFileName

setCssFileName: (cssFileName: string) => void;

Sets css file name for the application.

method setInBackground

setInBackground: (value: boolean, additonalData?: any) => void;

method setMaxRefreshRate

setMaxRefreshRate: (options?: {
    min?: number;
    max?: number;
    preferred?: number;
}) => void;

iOS Only Dynamically change the preferred frame rate For devices (iOS 15+) which support min/max/preferred frame rate you can specify ranges For devices (iOS < 15), you can specify the max frame rate see: https://developer.apple.com/documentation/quartzcore/optimizing_promotion_refresh_rates_for_iphone_13_pro_and_ipad_pro To use, ensure your Info.plist has:
<key>CADisableMinimumFrameDurationOnPhone</key> <true/>
Parameter options

method setOrientation

protected setOrientation: (value: 'portrait' | 'landscape' | 'unknown') => void;

method setResources

setResources: (res: any) => void;

Set application level static resources.

method setSuspended

setSuspended: (value: boolean, additonalData?: any) => void;

method setSystemAppearance

protected setSystemAppearance: (value: 'dark' | 'light') => void;

method systemAppearance

systemAppearance: () => 'dark' | 'light' | null;

method systemAppearanceChanged

systemAppearanceChanged: (
    rootView: View,
    newSystemAppearance: 'dark' | 'light'
) => void;

Updates root view classes including those of modals
Parameter rootView
the root view
Parameter newSystemAppearance
the new appearance change

class Background

class Background {}

property borderBottomColor

borderBottomColor: Color;

property borderBottomLeftRadius

borderBottomLeftRadius: number;

property borderBottomRightRadius

borderBottomRightRadius: number;

property borderBottomWidth

borderBottomWidth: number;

property borderLeftColor

borderLeftColor: Color;

property borderLeftWidth

borderLeftWidth: number;

property borderRightColor

borderRightColor: Color;

property borderRightWidth

borderRightWidth: number;

property borderTopColor

borderTopColor: Color;

property borderTopLeftRadius

borderTopLeftRadius: number;

property borderTopRightRadius

borderTopRightRadius: number;

property borderTopWidth

borderTopWidth: number;

property boxShadow

boxShadow: BoxShadow;

property clearFlags

clearFlags: number;

property clipPath

clipPath: string;

property color

color: Color;

property default

static default: Background;

property image

image: string | LinearGradient;

property position

position: string;

property repeat

repeat: CoreTypes.BackgroundRepeatType;

property size

size: string;

method equals

static equals: (value1: Background, value2: Background) => boolean;

method getBoxShadow

getBoxShadow: () => BoxShadow;

method getUniformBorderColor

getUniformBorderColor: () => Color;

method getUniformBorderRadius

getUniformBorderRadius: () => number;

method getUniformBorderWidth

getUniformBorderWidth: () => number;

method hasBorder

hasBorder: () => boolean;

method hasBorderColor

hasBorderColor: () => boolean;

method hasBorderRadius

hasBorderRadius: () => boolean;

method hasBorderWidth

hasBorderWidth: () => boolean;

method hasBoxShadow

hasBoxShadow: () => boolean;

method hasUniformBorder

hasUniformBorder: () => boolean;

method hasUniformBorderColor

hasUniformBorderColor: () => boolean;

method hasUniformBorderRadius

hasUniformBorderRadius: () => boolean;

method hasUniformBorderWidth

hasUniformBorderWidth: () => boolean;

method isEmpty

isEmpty: () => boolean;

method toString

toString: () => string;

method withBorderBottomColor

withBorderBottomColor: (value: Color) => Background;

method withBorderBottomLeftRadius

withBorderBottomLeftRadius: (value: number) => Background;

method withBorderBottomRightRadius

withBorderBottomRightRadius: (value: number) => Background;

method withBorderBottomWidth

withBorderBottomWidth: (value: number) => Background;

method withBorderLeftColor

withBorderLeftColor: (value: Color) => Background;

method withBorderLeftWidth

withBorderLeftWidth: (value: number) => Background;

method withBorderRightColor

withBorderRightColor: (value: Color) => Background;

method withBorderRightWidth

withBorderRightWidth: (value: number) => Background;

method withBorderTopColor

withBorderTopColor: (value: Color) => Background;

method withBorderTopLeftRadius

withBorderTopLeftRadius: (value: number) => Background;

method withBorderTopRightRadius

withBorderTopRightRadius: (value: number) => Background;

method withBorderTopWidth

withBorderTopWidth: (value: number) => Background;

method withBoxShadow

withBoxShadow: (value: BoxShadow) => Background;

method withClipPath

withClipPath: (value: string) => Background;

method withColor

withColor: (value: Color) => Background;

method withImage

withImage: (value: string | LinearGradient) => Background;

method withPosition

withPosition: (value: string) => Background;

method withRepeat

withRepeat: (value: CoreTypes.BackgroundRepeatType) => Background;

method withSize

withSize: (value: string) => Background;

class Binding

class Binding {}

constructor

constructor(target: ViewBase, options: BindingOptions);

property options

options: BindingOptions;

property sourceIsBindingContext

sourceIsBindingContext: boolean;

property target

target: WeakRef<ViewBase>;

property updating

updating: boolean;

method bind

bind: (source: any) => void;

method clearBinding

clearBinding: () => void;

method clearSource

clearSource: () => void;

method loadedHandlerVisualTreeBinding

loadedHandlerVisualTreeBinding: (args: any) => void;

method onSourcePropertyChanged

onSourcePropertyChanged: (data: PropertyChangeData) => void;

method unbind

unbind: () => void;

class Builder

class Builder {}

property knownCollections

static knownCollections: Set<string>;

property knownMultiTemplates

static knownMultiTemplates: Set<string>;

property knownTemplates

static knownTemplates: Set<string>;

UI plugin developers can add to these to define their own custom types if needed

method createViewFromEntry

static createViewFromEntry: (entry: NavigationEntry) => View;

Creates view from navigation entry
Parameter entry
NavigationEntry

method load

static load: {
    (moduleName: string, exports?: any): View;
    (options: LoadOptions): View;
};

Loads component from module with context
Parameter moduleName
the module name
Parameter exports
the context of the component to be loaded
Loads component from options
Parameter options
Load options

method parse

static parse: (value: string | Template, exports?: any) => View;

method parseMultipleTemplates

static parseMultipleTemplates: (
    value: string,
    exports?: any
) => Array<KeyedTemplate>;

Creates an array of KeyedTemplates from string
Parameter value
The xml of the template to be parsed
Parameter exports
Current context of the template

class Button

class Button extends TextBase {}

Represents a standard Button widget.

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/widget/Button.html) that represents the user interface for this component. Valid only when running on Android OS.

property ios

ios: any;

Gets the native [UIButton](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIButton_Class/) that represents the user interface for this component. Valid only when running on iOS.

property tapEvent

static tapEvent: string;

String value used when hooking to tap event.

property textWrap

textWrap: boolean;

Gets or sets whether the Button wraps text or not.

method on

on: {
    (
        eventName: string,
        callback: (data: EventData) => void,
        thisArg?: any
    ): void;
    (event: 'tap', callback: (args: EventData) => void, thisArg?: any): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when a tap event occurs.

class ChangeType

class ChangeType {}

property Add

static Add: string;

property Change

static Change: string;

property Delete

static Delete: string;

property Splice

static Splice: string;

property Update

static Update: string;

class CoercibleProperty

class CoercibleProperty<T extends ViewBase, U>
    extends Property<T, U>
    implements CoercibleProperty<T, U> {}

constructor

constructor(options: CoerciblePropertyOptions<T, U>);

property coerce

readonly coerce: (target: T) => void;

class Color

class Color {}

Represents a color object. Stores all color components (alpha (opacity), red, green, blue) in a [0..255] range.

constructor

constructor(knownColor: string);

constructor

constructor(hex: string);

constructor

constructor(argb: number);

constructor

constructor(
    alpha: number,
    red: number,
    green: number,
    blue: number,
    type?: 'rgb' | 'hsl' | 'hsv'
);

property a

a: number;

Gets the Alpha component (in the [0, 255] range) of this color. This is a read-only property.

property android

android: number;

Gets the android-specific integer value representation. Same as the Argb one. This is a read-only property.

property argb

argb: number;

Gets the Argb Number representation of this color where each 8 bits represent a single color component. This is a read-only property.

property b

b: number;

Gets the Blue component (in the [0, 255] range) of this color. This is a read-only property.

property g

g: number;

Gets the Green component (in the [0, 255] range) of this color. This is a read-only property.

property hex

hex: string;

Gets the Hexadecimal string representation of this color. This is a read-only property.

property ios

ios: any;

Gets the iOS-specific UIColor value representation. This is a read-only property.

property name

name: string;

Gets the known name of this instance. Defined only if it has been constructed from a known color name - e.g. "red". This is a read-only property.

property r

r: number;

Gets the Red component (in the [0, 255] range) of this color. This is a read-only property.

method brighten

brighten: (amount: number) => Color;

Brighten the color a given amount, from 0 to 100.
Parameter amount
(between 0 and 100)

method complement

complement: () => Color;

returns the color complement

method darken

darken: (amount: number) => Color;

Darken the color a given amount, from 0 to 100. Providing 100 will always return black.
Parameter amount
(between 0 and 100)

method desaturate

desaturate: (amount: number) => Color;

Desaturate the color a given amount, from 0 to 100. Providing 100 will is the same as calling greyscale.
Parameter amount
(between 0 and 100)

method equals

static equals: (value1: Color, value2: Color) => boolean;

Specifies whether this Color is equal to the Color parameter.
Parameter value
The Color to test.
Compares two Color instances.
Parameter value1
A Color to compare.
Parameter value2
A Color to compare.

method fromHSL

static fromHSL: (a: any, h: any, s: any, l: any) => Color;

returns a new Color from HSL

method fromHSV

static fromHSV: (a: any, h: any, s: any, l: any) => Color;

method fromIosColor

static fromIosColor: (value: any) => Color;

Creates color from iOS-specific UIColor value representation.

method getBrightness

getBrightness: () => number;

return the [brightness](http://www.w3.org/TR/AERT#color-contrast)

method getLuminance

getLuminance: () => number;

return the [luminance](http://www.w3.org/TR/2008/REC-WCAG20-20081211/#relativeluminancedef)

method greyscale

greyscale: () => Color;

Completely desaturates a color into greyscale. Same as calling desaturate(100).
Returns

method isDark

isDark: () => boolean;

return true if brightenss < 128

method isLight

isLight: () => boolean;

return true if brightenss >= 128

method isValid

static isValid: (value: any) => boolean;

Validates if a value can be converted to color.
Parameter value
Input string.

method lighten

lighten: (amount: number) => Color;

Lighten the color a given amount, from 0 to 100. Providing 100 will always return white.
Parameter amount
(between 0 and 100)
Returns
olor : Color

method mix

static mix: (color1: Color, color2: Color, amount: number) => Color;

returns the color complement

method saturate

saturate: (amount: number) => Color;

Saturate the color a given amount, from 0 to 100.
Parameter amount
(between 0 and 100)

method setAlpha

setAlpha: (a: number) => Color;

Return this color (as a new Color instance) with the provided alpha
Parameter alpha
(between 0 and 255)

method spin

spin: (amount: number) => Color;

Spin the hue a given amount, from -360 to 360. Calling with 0, 360, or -360 will do nothing (since it sets the hue back to what it was before).
Parameter amount
(between 0 and 100)

method toHsl

toHsl: () => { h: number; s: number; l: number; a: number };

return the hsl representation of the color

method toHslString

toHslString: () => string;

return the [CSS hsv](https://www.w3schools.com/Css/css_colors_hsl.asp) representation of the color

method toHsv

toHsv: () => { h: number; s: number; v: number; a: number };

return the hsv representation of the color

method toHsvString

toHsvString: () => string;

return the [CSS hsv](https://www.w3schools.com/Css/css_colors_rgb.asp) representation of the color

method toRgbString

toRgbString: () => string;

return the [CSS rgb](https://www.w3schools.com/Css/css_colors_rgb.asp) representation of the color

class ContainerView

class ContainerView extends View {}

Base class for all UI components that are containers.

property iosOverflowSafeArea

iosOverflowSafeArea: boolean;

Instruct container view to expand beyond the safe area. This property is iOS specific. Default value: true

class ContentView

class ContentView extends CustomLayoutView implements AddChildFromBuilder {}

property content

content: View;

method layoutView

layoutView: () => View;

class ControlStateChangeListener

class ControlStateChangeListener {}

An utility class used for supporting styling infrastructure. WARNING: This class is intended for IOS only.

constructor

constructor(control: any, callback: (state: string) => void);

Initializes an instance of ControlStateChangeListener class.
Parameter control
An instance of the UIControl which state will be watched.
Parameter callback
A callback called when a visual state of the UIControl is changed.

method start

start: () => any;

method stop

stop: () => any;

class CssAnimationParser

class CssAnimationParser {}

method keyframeAnimationsFromCSSDeclarations

static keyframeAnimationsFromCSSDeclarations: (
    declarations: KeyframeDeclaration[]
) => KeyframeAnimationInfo[];

method keyframesArrayFromCSS

static keyframesArrayFromCSS: (keyframes: UnparsedKeyframe[]) => KeyframeInfo[];

class CssAnimationProperty

class CssAnimationProperty<T extends Style, U>
    implements CssAnimationProperty<T, U> {}

constructor

constructor(options: CssAnimationPropertyOptions<T, U>);

property cssLocalName

readonly cssLocalName: string;

property cssName

readonly cssName: string;

property defaultValue

readonly defaultValue: {};

property defaultValueKey

readonly defaultValueKey: Symbol;

property getDefault

readonly getDefault: Symbol;

property isStyleProperty

isStyleProperty: boolean;

property key

readonly key: Symbol;

property keyframe

readonly keyframe: string;

property name

readonly name: string;

property register

readonly register: (cls: { prototype: any }) => void;

property setNative

readonly setNative: Symbol;

method isSet

isSet: (instance: T) => boolean;

class CssProperty

class CssProperty<T extends Style, U> implements CssProperty<T, U> {}

constructor

constructor(options: CssPropertyOptions<T, U>);

property cssLocalName

readonly cssLocalName: string;

property cssName

readonly cssName: string;

property cssValueDescriptor

protected readonly cssValueDescriptor: PropertyDescriptor;

property defaultValue

readonly defaultValue: {};

property defaultValueKey

readonly defaultValueKey: Symbol;

property getDefault

readonly getDefault: Symbol;

property isStyleProperty

isStyleProperty: boolean;

property key

readonly key: Symbol;

property localValueDescriptor

protected readonly localValueDescriptor: PropertyDescriptor;

property name

readonly name: string;

property overrideHandlers

overrideHandlers: (options: CssPropertyOptions<T, U>) => void;

property setNative

readonly setNative: Symbol;

property sourceKey

readonly sourceKey: Symbol;

method isSet

isSet: (instance: T) => boolean;

method register

register: (cls: { prototype: T }) => void;

class CustomLayoutView

class CustomLayoutView extends ContainerView {}

Base class for all UI components that implement custom layouts.

class DatePicker

class DatePicker extends View {}

Represents an date picker.

property android

android: any;

Gets the native [android.widget.DatePicker](http://developer.android.com/reference/android/widget/DatePicker.html) that represents the user interface for this component. Valid only when running on Android OS.

property date

date: Date;

Gets or sets the entire date.

property day

day: number;

Gets or sets the day. The days start from 1.

property ios

ios: any;

Gets the native iOS [UIDatePicker](http://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UIDatePicker_Class/index.html) that represents the user interface for this component. Valid only when running on iOS.

property iosPreferredDatePickerStyle

iosPreferredDatePickerStyle: number;

Gets or set the UIDatePickerStyle of the date picker in iOS 13.4+. Defaults to 0. Valid values are numbers: - 0: automatic (system picks the concrete style based on the current platform and date picker mode) - 1: wheels (the date picker displays as a wheel picker) - 2: compact (the date picker displays as a label that when tapped displays a calendar-style editor) - 3: inline (the date pickers displays as an inline, editable field)

property maxDate

maxDate: Date;

Gets or sets the max date.

property minDate

minDate: Date;

Gets or sets the min date.

property month

month: number;

Gets or sets the month. The months start from 1.

property year

year: number;

Gets or sets the year.

class DockLayout

class DockLayout extends LayoutBase {}

A Layout that arranges its children at its outer edges, and allows its last child to take up the remaining space.

property stretchLastChild

stretchLastChild: boolean;

Gets or sets a value that indicates whether the last child element within a DockLayout stretches to fill the remaining available space. The default value is true.

method getDock

static getDock: (view: View) => CoreTypes.DockType;

Gets the value of the Dock property from a given View.

method setDock

static setDock: (view: View, value: CoreTypes.DockType) => void;

Sets the value of the Dock property from a given View.

class EditableTextBase

class EditableTextBase extends TextBase {}

Represents the base class for all editable text views.

property autocapitalizationType

autocapitalizationType: CoreTypes.AutocapitalizationInputType;

Gets or sets the autocapitalization type.

property autocorrect

autocorrect: boolean;

Enables or disables autocorrection.

property autofillType

autofillType: string;

Gets or sets the autofill type.

property blurEvent

static blurEvent: string;

property editable

editable: boolean;

Gets or sets whether the instance is editable.

property focusEvent

static focusEvent: string;

property hint

hint: string;

Gets or sets the placeholder text.

property keyboardType

keyboardType: CoreTypes.KeyboardInputType;

Gets or sets the soft keyboard type.

property maxLength

maxLength: number;

Limits input to a certain number of characters.

property returnKeyType

returnKeyType: CoreTypes.ReturnKeyButtonType;

Gets or sets the soft keyboard return key flavor.

property textChangeEvent

static textChangeEvent: string;

property updateTextTrigger

updateTextTrigger: CoreTypes.UpdateTextTriggerType;

Gets or sets a value indicating when the text property will be updated.

property valueFormatter

valueFormatter: (value: string) => string;

Format input values Note: useful for input masking/formatting

method dismissSoftInput

dismissSoftInput: () => void;

Hides the soft input method, ususally a soft keyboard.

method setSelection

setSelection: (start: number, stop?: number) => any;

Set the selection anchor to start and the selection edge to stop

class FadeTransition

class FadeTransition extends Transition {}

class File

class File extends FileSystemEntity {}

Represents a File entity on the file system.

property android

static readonly android: Android;

property extension

extension: string;

Gets the extension of the file.

property ios

static readonly ios: iOS;

property isLocked

isLocked: boolean;

Gets a value indicating whether the file is currently locked, meaning a background operation associated with this file is running.

property size

size: number;

Gets the size in bytes of the file.

method append

append: (content: any) => Promise<void>;

Appends the provided binary content to the file.
Parameter content
The binary content to be saved to the file.

method appendSync

appendSync: (content: any, onError?: (error: any) => any) => void;

Appends the provided binary content to the file synchronously.
Parameter content
The binary content to be saved to the file.
Parameter onError
An optional function to be called if some IO-error occurs.

method appendText

appendText: (content: string, encoding?: string) => Promise<any>;

Appends the provided string to the file, using the specified encoding (defaults to UTF-8).
Parameter content
The content to be saved to the file.
Parameter encoding
An optional value specifying the preferred encoding (defaults to UTF-8).

method appendTextSync

appendTextSync: (
    content: string,
    onError?: (error: any) => any,
    encoding?: string
) => void;

Appends the provided string to the file synchronously, using the specified encoding (defaults to UTF-8).
Parameter content
The content to be saved to the file.
Parameter onError
An optional function to be called if some IO-error occurs.
Parameter encoding
An optional value specifying the preferred encoding (defaults to UTF-8).

method copy

copy: (dest: string) => Promise<boolean>;

Copies a file to a given path.
Parameter dest
The path to the destination file. Returns a Promise with a boolean.

method copySync

copySync: (dest: string, onError?: (error: any) => any) => any;

Copies a file to a given path.
Parameter dest
The path to the destination file.
Parameter onError
(optional) A callback function to use if any error occurs. Returns a Promise with a boolean.

method exists

static exists: (path: string) => boolean;

Checks whether a File with the specified path already exists.
Parameter path
The path to check for.

method fromPath

static fromPath: (path: string, copy?: boolean) => File;

Gets or creates a File entity at the specified path.
Parameter path
The path to get/create the file at.
Parameter copy
An optional value when set, copies the content-uri to a temp file enabling the legacy behaviour

method read

read: () => Promise<any>;

Reads the binary content of the file asynchronously.

method readSync

readSync: (onError?: (error: any) => any) => any;

Reads the binary content of the file synchronously.
Parameter onError
An optional function to be called if some IO-error occurs.

method readText

readText: (encoding?: string) => Promise<string>;

Reads the content of the file as a string using the specified encoding (defaults to UTF-8).
Parameter encoding
An optional value specifying the preferred encoding (defaults to UTF-8).

method readTextSync

readTextSync: (onError?: (error: any) => any, encoding?: string) => string;

Reads the content of the file as a string synchronously, using the specified encoding (defaults to UTF-8).
Parameter onError
An optional function to be called if some IO-error occurs.
Parameter encoding
An optional value specifying the preferred encoding (defaults to UTF-8).

method write

write: (content: any) => Promise<void>;

Writes the provided binary content to the file.
Parameter content
The binary content to be saved to the file.

method writeSync

writeSync: (content: any, onError?: (error: any) => any) => void;

Writes the provided binary content to the file synchronously.
Parameter content
The binary content to be saved to the file.
Parameter onError
An optional function to be called if some IO-error occurs.

method writeText

writeText: (content: string, encoding?: string) => Promise<any>;

Writes the provided string to the file, using the specified encoding (defaults to UTF-8).
Parameter content
The content to be saved to the file.
Parameter encoding
An optional value specifying the preferred encoding (defaults to UTF-8).

method writeTextSync

writeTextSync: (
    content: string,
    onError?: (error: any) => any,
    encoding?: string
) => void;

Writes the provided string to the file synchronously, using the specified encoding (defaults to UTF-8).
Parameter content
The content to be saved to the file.
Parameter onError
An optional function to be called if some IO-error occurs.
Parameter encoding
An optional value specifying the preferred encoding (defaults to UTF-8).

class FileSystemEntity

class FileSystemEntity {}

Represents a single entity on the file system.

property lastModified

lastModified: Date;

Gets the Date object specifying the last time this entity was modified.

property name

name: string;

Gets the name of the entity.

property parent

parent: Folder;

Gets the Folder object representing the parent of this entity. Will be null for a root folder like Documents or Temporary. This property is readonly.

property path

path: string;

Gets the fully-qualified path (including the extension for a File) of the entity.

method remove

remove: () => Promise<any>;

Removes (deletes) the current Entity from the file system.

method removeSync

removeSync: (onError?: (error: any) => any) => void;

Removes (deletes) the current Entity from the file system synchronously.

method rename

rename: (newName: string) => Promise<any>;

Renames the current entity using the specified name.
Parameter newName
The new name to be applied to the entity.

method renameSync

renameSync: (newName: string, onError?: (error: any) => any) => void;

Renames the current entity synchronously, using the specified name.
Parameter newName
The new name to be applied to the entity.

class FlexboxLayout

class FlexboxLayout extends LayoutBase {}

property alignContent

alignContent: AlignContent;

property alignItems

alignItems: AlignItems;

property flexDirection

flexDirection: FlexDirection;

property flexWrap

flexWrap: FlexWrap;

property justifyContent

justifyContent: JustifyContent;

method getAlignSelf

static getAlignSelf: (view: View) => AlignSelf;

method getFlexGrow

static getFlexGrow: (view: View) => any;

method getFlexShrink

static getFlexShrink: (view: View) => number;

method getFlexWrapBefore

static getFlexWrapBefore: (view: View) => boolean;

method getOrder

static getOrder: (view: View) => number;

method setAlignSelf

static setAlignSelf: (view: View, align: AlignSelf) => any;

method setFlexGrow

static setFlexGrow: (view: View, grow: number) => any;

method setFlexShrink

static setFlexShrink: (view: View, shrink: number) => any;

method setFlexWrapBefore

static setFlexWrapBefore: (view: View, wrap: boolean) => any;

method setOrder

static setOrder: (view: View, order: number) => any;

class Folder

class Folder extends FileSystemEntity {}

Represents a Folder (directory) entity on the file system.

property isKnown

isKnown: boolean;

Determines whether this instance is a KnownFolder (accessed through the KnownFolders object).

method clear

clear: () => Promise<any>;

Deletes all the files and folders (recursively), contained within this Folder.

method clearSync

clearSync: (onError?: (error: any) => void) => void;

Deletes all the files and folders (recursively), contained within this Folder synchronously.
Parameter onError
An optional function to be called if some error occurs.

method contains

contains: (name: string) => boolean;

Checks whether this Folder contains an Entity with the specified name. The path of the folder is added to the name to resolve the complete path to check for.
Parameter name
The name of the entity to check for.

method eachEntity

eachEntity: (onEntity: (entity: FileSystemEntity) => boolean) => any;

Enumerates all the top-level FileSystem entities residing within this folder.
Parameter onEntity
A callback that receives the current entity. If the callback returns false this will mean for the iteration to stop.

method exists

static exists: (path: string) => boolean;

Checks whether a Folder with the specified path already exists.
Parameter path
The path to check for.

method fromPath

static fromPath: (path: string) => Folder;

Gets or creates a Folder entity at the specified path.
Parameter path
The path to get/create the folder at.

method getEntities

getEntities: () => Promise<Array<FileSystemEntity>>;

Gets all the top-level entities residing within this folder.

method getEntitiesSync

getEntitiesSync: (onError?: (error: any) => any) => Array<FileSystemEntity>;

Gets all the top-level entities residing within this folder synchronously.
Parameter onError
An optional function to be called if some error occurs.

method getFile

getFile: (name: string) => File;

Gets or creates a File entity with the specified name within this Folder.
Parameter name
The name of the file to get/create.

method getFolder

getFolder: (name: string) => Folder;

Gets or creates a Folder entity with the specified name within this Folder.
Parameter name
The name of the folder to get/create.

class Font

class Font extends FontBase {}

constructor

constructor(
    family: string,
    size: number,
    style?: FontStyleType,
    weight?: FontWeightType,
    scale?: number,
    fontVariationSettings?: FontVariationSettings[]
);

property default

static default: Font;

property fontFamily

fontFamily: string;

property fontScale

fontScale: number;

property fontSize

fontSize: number;

property fontStyle

fontStyle: FontStyleType;

property fontVariationSettings

fontVariationSettings?: FontVariationSettingsType[];

property fontWeight

fontWeight: FontWeightType;

property isBold

isBold: boolean;

property isItalic

isItalic: boolean;

method equals

static equals: (value1: Font, value2: Font) => boolean;

method getAndroidTypeface

getAndroidTypeface: () => any;

method getUIFont

getUIFont: (defaultFont: any) => any;

method withFontFamily

withFontFamily: (family: string) => Font;

method withFontScale

withFontScale: (scale: number) => Font;

method withFontSize

withFontSize: (size: number) => Font;

method withFontStyle

withFontStyle: (style: FontStyleType) => Font;

method withFontVariationSettings

withFontVariationSettings: (variationSettings: FontVariationSettings[]) => Font;

method withFontWeight

withFontWeight: (weight: FontWeightType) => Font;

class FormattedString

class FormattedString extends ViewBase {}

A class used to create a formatted (rich text) string.

property backgroundColor

backgroundColor: Color;

Gets or sets the font background color which will be used for all spans that doesn't have a specific value.

property color

color: Color;

Gets or sets the font foreground color which will be used for all spans that doesn't have a specific value.

property fontFamily

fontFamily: string;

Gets or sets the font family which will be used for all spans that doesn't have a specific value.

property fontSize

fontSize: number;

Gets or sets the font size which will be used for all spans that doesn't have a specific value.

property fontStyle

fontStyle: FontStyleType;

Gets or sets the font style which will be used for all spans that doesn't have a specific value.

property fontVariationSettings

fontVariationSettings: FontVariationSettingsType[];

Gets or sets the font variation settings which will be used for all spans that doesn't have a specific value.

property fontWeight

fontWeight: FontWeightType;

Gets or sets the font weight which will be used for all spans that doesn't have a specific value.

property iosAccessibilityAdjustsFontSize

iosAccessibilityAdjustsFontSize: boolean;

Defines whether accessibility font scale should affect font size.

property iosAccessibilityMaxFontScale

iosAccessibilityMaxFontScale: number;

Gets or sets the maximum accessibility font scale.

property iosAccessibilityMinFontScale

iosAccessibilityMinFontScale: number;

Gets or sets the minimum accessibility font scale.

property spans

spans: ObservableArray<Span>;

An observable collection of Span objects used to define common text properties.

property textDecoration

textDecoration: CoreTypes.TextDecorationType;

Gets or sets text decorations which will be used for all spans that doesn't have a specific value.

method toString

toString: () => string;

A human readable representation of the formatted string.

class Frame

class Frame extends FrameBase {}

Represents the logical View unit that is responsible for navigation within an application. Nested frames are supported, enabling hierarchical navigation scenarios.

property actionBarVisibility

actionBarVisibility: 'auto' | 'always' | 'never';

Used to control the visibility the Navigation Bar in iOS and the Action Bar in Android.

property android

android: AndroidFrame;

Gets the AndroidFrame object that represents the Android-specific APIs for this Frame. Valid when running on Android OS.

property animated

animated: boolean;

Gets or sets if navigation transitions should be animated.

property backStack

backStack: BackstackEntry[];

Gets the back stack of this instance.

property currentEntry

currentEntry: NavigationEntry;

Gets the NavigationEntry instance the Frame is currently navigated to.

property currentPage

currentPage: Page;

Gets the Page instance the Frame is currently navigated to.

property defaultAnimatedNavigation

static defaultAnimatedNavigation: boolean;

Gets or sets if navigation transitions should be animated globally.

property defaultTransition

static defaultTransition: NavigationTransition;

Gets or sets the default NavigationTransition for all frames across the app.

property ios

ios: iOSFrame;

Gets the iOSFrame object that represents the iOS-specific APIs for this Frame. Valid when running on iOS.

property iosNavigationBarClass

iosNavigationBarClass: any;

Specify a custom UINavigationBar class (iOS only)

property iosToolBarClass

iosToolBarClass: any;

Specify a custom UIToolbar class (iOS only)

property navigatedToEvent

static readonly navigatedToEvent: string;

String value used when hooking to navigatedTo event.

property navigatingToEvent

static readonly navigatingToEvent: string;

String value used when hooking to navigatingTo event.

property navigationBarHeight

navigationBarHeight: number;

property transition

transition: NavigationTransition;

Gets or sets the default navigation transition for this frame.

method canGoBack

canGoBack: () => boolean;

Checks whether the goBack operation is available.

method getFrameById

static getFrameById: (id: string) => Frame;

Gets a frame by id.

method goBack

static goBack: () => any;

Navigates back using the navigation hierarchy (if any). Updates the Frame stack as needed. This method will start from the topmost Frame and will recursively search for an instance that has the canGoBack operation available.
Navigates to the previous entry (if any) in the back stack.
Parameter to
The backstack entry to navigate back to.

method isCurrent

isCurrent: (entry: BackstackEntry) => boolean;

Parameter entry
to check

method navigate

navigate: {
    (pageModuleName: string): any;
    (create: () => Page): any;
    (entry: NavigationEntry): any;
};

Navigates to a Page instance as described by the module name. This method will require the module and will check for a Page property in the exports of the module.
Parameter pageModuleName
The name of the module to require starting from the application root. For example if you want to navigate to page called "myPage.js" in a folder called "subFolder" and your root folder is "app" you can call navigate method like this: const frames = require("@nativescript/core/ui/frame"); frames.topmost().navigate("app/subFolder/myPage");
Creates a new Page instance using the provided callback and navigates to that Page.
Parameter create
The function to be used to create the new Page instance.
Navigates to a Page resolved by the provided NavigationEntry object. Since there are a couple of ways to specify a Page instance through an entry, there is a resolution priority: 1. entry.moduleName 2. entry.create()
Parameter entry
The NavigationEntry instance.

method navigationQueueIsEmpty

navigationQueueIsEmpty: () => boolean;

method on

on: {
    (
        eventName: string,
        callback: (args: EventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'navigatingTo',
        callback: (args: NavigationData) => void,
        thisArg?: any
    ): void;
    (
        event: 'navigatedTo',
        callback: (args: NavigationData) => void,
        thisArg?: any
    ): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when navigation to the page has started.
Raised when navigation to the page has finished.

method performNavigation

performNavigation: (navigationContext: NavigationContext) => void;

Parameter navigationContext

method reloadPage

static reloadPage: (context?: ModuleContext) => void;

method setCurrent

setCurrent: (entry: BackstackEntry, navigationType: NavigationType) => void;

Parameter entry
to set as current
Parameter navigationType

method topmost

static topmost: () => Frame;

Gets the topmost frame in the frames stack. An application will typically has one frame instance. Multiple frames handle nested (hierarchical) navigation scenarios.

class GesturesObserver

class GesturesObserver {}

Provides options for the GesturesObserver.

constructor

constructor(
    target: View,
    callback: (args: GestureEventData) => void,
    context: any
);

Creates an instance of GesturesObserver class.
Parameter target
The view for which the observer is created.
Parameter callback
A function that will be executed when a gesture is received.
Parameter context
default this argument for the callbacks.

property androidOnTouchEvent

androidOnTouchEvent: (motionEvent: any) => void;

An internal Android specific method used to pass the motion event to the correct gesture observer.

property callback

callback: (args: GestureEventData) => void;

A function that will be executed when a gesture is received.

property context

context: any;

A context which will be used as this in callback execution.

property type

type: GestureTypes;

Singular gesture type (e.g. GestureTypes.tap) attached to the observer. Does not support plural gesture types (e.g. GestureTypes.tap & GestureTypes.doubleTap).

method disconnect

disconnect: () => any;

Disconnects the gesture observer.

method observe

observe: (type: GestureTypes) => any;

Registers a gesture observer to a view and gesture.
Parameter type
Type of the gesture.

class GridLayout

class GridLayout extends LayoutBase {}

Defines a rectangular layout area that consists of columns and rows.

method addChildAtCell

addChildAtCell: (
    view: View,
    row: number,
    column: number,
    rowSpan?: number,
    columnSpan?: number
) => void;

Adds a child at specific cell in GridLayout. Optional rowSpan and columnSpan attributes

method addColumn

addColumn: (itemSpec: ItemSpec) => void;

Adds a column specification to a GridLayout.

method addRow

addRow: (itemSpec: ItemSpec) => void;

Adds a row specification to a GridLayout.

method getColumn

static getColumn: (view: View) => number;

Gets the value of the Column attached property from a given View.

method getColumns

getColumns: () => Array<ItemSpec>;

Gets array of column specifications defined on this instance of GridLayout.

method getColumnSpan

static getColumnSpan: (view: View) => number;

Gets the value of the ColumnSpan attached property from a given View.

method getRow

static getRow: (view: View) => number;

Gets the value of the Row attached property from a given View.

method getRows

getRows: () => Array<ItemSpec>;

Gets array of row specifications defined on this instance of GridLayout.

method getRowSpan

static getRowSpan: (view: View) => number;

Gets the value of the RowSpan attached property from a given View.

method removeColumn

removeColumn: (itemSpec: ItemSpec) => void;

Removes a column specification from a GridLayout.

method removeColumns

removeColumns: () => void;

Removes all column specifications from a GridLayout.

method removeRow

removeRow: (itemSpec: ItemSpec) => void;

Removes a row specification from a GridLayout.

method removeRows

removeRows: () => void;

Removes all row specifications from a GridLayout.

method setColumn

static setColumn: (view: View, value: number) => void;

Sets the value of the Column attached property to a given View.

method setColumnSpan

static setColumnSpan: (view: View, value: number) => void;

Sets the value of the ColumnSpan attached property to a given View.

method setRow

static setRow: (view: View, value: number) => void;

Sets the value of the Row attached property to a given View.

method setRowSpan

static setRowSpan: (view: View, value: number) => void;

Sets the value of the RowSpan attached property to a given View.

class HtmlView

class HtmlView extends View {}

Represents a view with html content. Use this component instead WebView when you want to show just static HTML content. [iOS support](https://developer.apple.com/documentation/foundation/nsattributedstring/1524613-initwithdata) [android support](http://developer.android.com/reference/android/text/Html.html)

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/widget/TextView.html) that represents the user interface for this component. Valid only when running on Android OS.

property html

html: string;

Gets or sets html string for the HtmlView.

property ios

ios: any;

Gets the native [UITextView](https://developer.apple.com/documentation/uikit/uitextview) that represents the user interface for this component. Valid only when running on iOS.

property selectable

selectable: boolean;

Gets or sets a value indicating whether HtmlView is selectable.

class Image

class Image extends View {}

Represents a class that provides functionality for loading and streching image(s).

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/widget/ImageView.html) that represents the user interface for this component. Valid only when running on Android OS.

property decodeHeight

decodeHeight: CoreTypes.LengthType;

Gets or sets the desired decode height of the image. This property is Android specific.

property decodeWidth

decodeWidth: CoreTypes.LengthType;

Gets or sets the desired decode width of the image. This property is Android specific.

property imageSource

imageSource: ImageSource;

Gets or sets the image source of the image.

property ios

ios: any;

Gets the native iOS [UIImageView](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIImageView_Class/) that represents the user interface for this component. Valid only when running on iOS.

property isLoading

readonly isLoading: boolean;

Gets a value indicating if the image is currently loading.

property loadMode

loadMode: 'sync' | 'async';

Gets or sets the loading strategy for images on the local file system: - **sync** - blocks the UI if necessary to display immediately, good for small icons. - **async** *(default)* - will load in the background, may appear with short delay, good for large images. When loading images from web they are always loaded **async** no matter of loadMode value.

property src

src: string | ImageSource | ImageAsset;

Gets or sets the source of the Image. This can be either an URL string or a native image instance.

property stretch

stretch: CoreTypes.ImageStretchType;

Gets or sets the image stretch mode.

property tintColor

tintColor: Color;

A color used to tint template images.

class ImageAsset

class ImageAsset extends Observable {}

constructor

constructor(asset: any);

property android

android: any;

property ios

ios: any;

property nativeImage

nativeImage: any;

property options

options: ImageAssetOptions;

method getImageAsync

getImageAsync: (callback: (image: any, error: any) => void) => any;

class ImageCache

class Cache extends Observable {}

Represents a class that stores handles image download requests and caches the already downloaded images.

property downloadedEvent

static downloadedEvent: string;

String value used when hooking to downloaded event.

property downloadErrorEvent

static downloadErrorEvent: string;

String value used when hooking to download error event.

property maxRequests

maxRequests: number;

The maximum number of simultaneous download requests. Defaults to 5.

property placeholder

placeholder: ImageSource;

The image to be used to notify for a pending download request - e.g. loading indicator.

method clear

clear: () => void;

Removes all the previously cached images.

method disableDownload

disableDownload: () => void;

Temporary disables download requests.

method enableDownload

enableDownload: () => void;

Enables previously suspended download requests.

method enqueue

enqueue: (request: DownloadRequest) => any;

Adds a new download request at the end of the download queue. This will be the last download to start.

method get

get: (key: string) => any;

Gets the image for the specified key. May be undefined if the key is not present in the cache.

method on

on: {
    (
        eventName: string,
        callback: (args: EventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'downloaded',
        callback: (args: DownloadedData) => void,
        thisArg?: any
    ): void;
    (
        event: 'downloadError',
        callback: (args: DownloadError) => void,
        thisArg?: any
    ): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when the image has been downloaded.
Raised if the image download errors.

method push

push: (request: DownloadRequest) => any;

Adds a new download request at the top of the download queue. This will be the next immediate download to start.

method remove

remove: (key: string) => void;

Removes the cache for the specified key.

method set

set: (key: string, image: any) => void;

Sets the image for the specified key.

class ImageSource

class ImageSource {}

Encapsulates the common abstraction behind a platform specific object (typically a Bitmap) that is used as a source for images.

constructor

constructor(nativeSource?: any);

Creates a new ImageSource instance and sets the provided native source object (typically a Bitmap). The native source object will update either the android or ios properties, depending on the target os.
Parameter nativeSource
The native image object. Will be either a Bitmap for Android or a UIImage for iOS.

property android

android: any;

The Android-specific [image](http://developer.android.com/reference/android/graphics/Bitmap.html) instance. Will be undefined when running on iOS.

property height

height: number;

Gets the height of this instance. This is a read-only property.

property ios

ios: any;

The iOS-specific [UIImage](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIImage_Class/) instance. Will be undefined when running on Android.

property rotationAngle

rotationAngle: number;

Gets or sets the rotation angle that should be applied to the image. (Used in android)

property width

width: number;

Gets the width of this instance. This is a read-only property.

method fromAsset

static fromAsset: (asset: ImageAsset) => Promise<ImageSource>;

Loads this instance from the specified asset asynchronously.
Parameter asset
The ImageAsset instance used to create ImageSource.
Parameter asset
The ImageAsset instance used to create ImageSource.
Deprecated
Use ImageSource.fromAsset() instead. Loads this instance from the specified asset asynchronously.

method fromBase64

static fromBase64: (source: string) => Promise<ImageSource>;

Loads this instance from the specified base64 encoded string asynchronously.
Parameter source
The Base64 string to load the image from.
Parameter source
The Base64 string to load the image from.
Deprecated
Use ImageSource.fromBase64() instead. Loads this instance from the specified base64 encoded string asynchronously.

method fromBase64Sync

static fromBase64Sync: (source: string) => ImageSource;

Loads this instance from the specified base64 encoded string.
Parameter source
The Base64 string to load the image from.

method fromData

static fromData: (data: any) => Promise<ImageSource>;

Loads this instance from the specified native image data asynchronously.
Parameter data
The native data (byte array) to load the image from. This will be either Stream for Android or NSData for iOS.
Parameter data
The native data (byte array) to load the image from. This will be either Stream for Android or NSData for iOS.
Deprecated
Use ImageSource.fromData() instead. Loads this instance from the specified native image data asynchronously.

method fromDataSync

static fromDataSync: (data: any) => ImageSource;

Loads this instance from the specified native image data.
Parameter data
The native data (byte array) to load the image from. This will be either Stream for Android or NSData for iOS.

method fromFile

static fromFile: (path: string) => Promise<ImageSource>;

Loads this instance from the specified file asynchronously.
Parameter path
The location of the file on the file system.
Parameter path
The location of the file on the file system.
Deprecated
Use ImageSource.fromFile() instead. Loads this instance from the specified file asynchronously.

method fromFileOrResourceSync

static fromFileOrResourceSync: (path: string) => ImageSource;

Creates a new ImageSource instance and loads it from the specified local file or resource (if specified with the "res://" prefix).
Parameter path
The location of the file on the file system.

method fromFileSync

static fromFileSync: (path: string) => ImageSource;

Loads this instance from the specified file.
Parameter path
The location of the file on the file system.

method fromFontIconCodeSync

static fromFontIconCodeSync: (
    source: string,
    font: Font,
    color: Color
) => ImageSource;

Creates a new ImageSource instance and loads it from the specified font icon code.
Parameter source
The hex font icon code string
Parameter font
The font for the corresponding font icon code
Parameter color
The color of the generated icon image

method fromResource

static fromResource: (name: string) => Promise<ImageSource>;

Loads this instance from the specified resource name asynchronously.
Parameter name
The name of the resource (without its extension).
Parameter name
The name of the resource (without its extension).
Deprecated
Use ImageSource.fromResource() instead. Loads this instance from the specified resource name asynchronously.

method fromResourceSync

static fromResourceSync: (name: string) => ImageSource;

Loads this instance from the specified resource name.
Parameter name
The name of the resource (without its extension).

method fromSystemImage

static fromSystemImage: (
    name: string,
    scale?: iosSymbolScaleType
) => Promise<ImageSource>;

Loads this instance from the specified system image name asynchronously.
Parameter name
the name of the system image

method fromSystemImageSync

static fromSystemImageSync: (
    name: string,
    scale?: iosSymbolScaleType
) => ImageSource;

Loads this instance from the specified system image name.
Parameter name
the name of the system image

method fromUrl

static fromUrl: (url: string) => Promise<ImageSource>;

Downloads the image from the provided Url and creates a new ImageSource instance from it.
Parameter url
The link to the remote image object. This operation will download and decode the image.

method iosSymbolScaleFor

static iosSymbolScaleFor: (scale: iosSymbolScaleType) => number;

(iOS only) Get system symbol scale
Parameter scale
symbol scale type

method loadFromBase64

loadFromBase64: (source: string) => boolean;

Parameter source
The Base64 string to load the image from.
Deprecated
Use ImageSource.fromBase64Sync() instead. Loads this instance from the specified base64 encoded string.

method loadFromData

loadFromData: (data: any) => boolean;

Parameter data
The native data (byte array) to load the image from. This will be either Stream for Android or NSData for iOS.
Deprecated
Use ImageSource.fromDataSync() instead. Loads this instance from the specified native image data.

method loadFromFile

loadFromFile: (path: string) => boolean;

Parameter path
The location of the file on the file system.
Deprecated
Use ImageSource.fromFileSync() instead. Loads this instance from the specified file.

method loadFromFontIconCode

loadFromFontIconCode: (source: string, font: Font, color: Color) => boolean;

Parameter source
The hex font icon code string
Parameter font
The font for the corresponding font icon code
Parameter color
The color of the generated icon image
Deprecated
Use ImageSource.fromFontIconCode() instead. Loads this instance from the specified font icon code.

method loadFromResource

loadFromResource: (name: string) => boolean;

Parameter name
The name of the resource (without its extension).
Deprecated
Use ImageSource.fromResourceSync() instead. Loads this instance from the specified resource name.

method resize

resize: (maxSize: number, options?: any) => ImageSource;

Returns a new ImageSource that is a resized version of this image with the same aspect ratio, but the max dimension set to the provided maxSize.
Parameter maxSize
The maximum pixel dimension of the resulting image.
Parameter options
Optional parameter, Only used for android, options.filter is a boolean which determines whether or not bilinear filtering should be used when scaling the bitmap. If this is true then bilinear filtering will be used when scaling which has better image quality at the cost of worse performance. If this is false then nearest-neighbor scaling is used instead which will have worse image quality but is faster. Recommended default is to set filter to 'true' as the cost of bilinear filtering is typically minimal and the improved image quality is significant.

method resizeAsync

resizeAsync: (maxSize: number, options?: any) => Promise<ImageSource>;

Returns a new ImageSource that is a resized version of this image with the same aspect ratio, but the max dimension set to the provided maxSize asynchronously.
Parameter maxSize
The maximum pixel dimension of the resulting image.
Parameter options
Optional parameter, Only used for android, options.filter is a boolean which determines whether or not bilinear filtering should be used when scaling the bitmap. If this is true then bilinear filtering will be used when scaling which has better image quality at the cost of worse performance. If this is false then nearest-neighbor scaling is used instead which will have worse image quality but is faster. Recommended default is to set filter to 'true' as the cost of bilinear filtering is typically minimal and the improved image quality is significant.

method saveToFile

saveToFile: (
    path: string,
    format: 'png' | 'jpeg' | 'jpg',
    quality?: number
) => boolean;

Saves this instance to the specified file, using the provided image format and quality.
Parameter path
The path of the file on the file system to save to.
Parameter format
The format (encoding) of the image.
Parameter quality
Optional parameter, specifying the quality of the encoding. Defaults to the maximum available quality. Quality varies on a scale of 0 to 100.

method saveToFileAsync

saveToFileAsync: (
    path: string,
    format: 'png' | 'jpeg' | 'jpg',
    quality?: number
) => Promise<boolean>;

Saves this instance to the specified file, using the provided image format and quality asynchronously.
Parameter path
The path of the file on the file system to save to.
Parameter format
The format (encoding) of the image.
Parameter quality
Optional parameter, specifying the quality of the encoding. Defaults to the maximum available quality. Quality varies on a scale of 0 to 100.

method setNativeSource

setNativeSource: (nativeSource: any) => void;

Sets the provided native source object (typically a Bitmap or a UIImage). This will update either the android or ios properties, depending on the target os.
Parameter nativeSource
The native image object. Will be either a Bitmap for Android or a UIImage for iOS.

method toBase64String

toBase64String: (format: 'png' | 'jpeg' | 'jpg', quality?: number) => string;

Converts the image to base64 encoded string, using the provided image format and quality.
Parameter format
The format (encoding) of the image.
Parameter quality
Optional parameter, specifying the quality of the encoding. Defaults to the maximum available quality. Quality varies on a scale of 0 to 100.

method toBase64StringAsync

toBase64StringAsync: (
    format: 'png' | 'jpeg' | 'jpg',
    quality?: number
) => Promise<string>;

Converts the image to base64 encoded string, using the provided image format and quality asynchronously.
Parameter format
The format (encoding) of the image.
Parameter quality
Optional parameter, specifying the quality of the encoding. Defaults to the maximum available quality. Quality varies on a scale of 0 to 100.

class ImageSymbolEffect

class ImageSymbolEffect {}

iOS only Symbol effects: https://developer.apple.com/documentation/symbols?language=objc

constructor

constructor(symbol: NSSymbolEffect);

property completion

completion?: (context: UISymbolEffectCompletionContext) => void;

property effect

effect?: NSSymbolEffect;

property options

options?: NSSymbolEffectOptions;

method fromSymbol

static fromSymbol: (symbol: string) => ImageSymbolEffect | null;

class InheritedCssProperty

class InheritedCssProperty<T extends Style, U>
    extends CssProperty<T, U>
    implements InheritedCssProperty<T, U> {}

constructor

constructor(options: CssPropertyOptions<T, U>);

property setInheritedValue

setInheritedValue: (value: U) => void;

class InheritedProperty

class InheritedProperty<T extends ViewBase, U>
    extends Property<T, U>
    implements InheritedProperty<T, U> {}

constructor

constructor(options: PropertyOptions<T, U>);

property setInheritedValue

readonly setInheritedValue: (value: U) => void;

property sourceKey

readonly sourceKey: Symbol;

class iOSApplication

class iOSApplication extends ApplicationCommon {}

property delegate

delegate: any;

The [UIApplicationDelegate](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIApplicationDelegate_Protocol/index.html) class.

property nativeApp

readonly nativeApp: UIApplication;

The [UIApplication](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIApplication_Class/index.html).

property rootController

readonly rootController: UIViewController;

The root view controller for the application.

property window

readonly window: UIWindow;

The key window.

method addDelegateHandler

addDelegateHandler: <T extends string | number | symbol>(
    methodName: T,
    handler: any
) => void;

Adds a delegate handler for the specified delegate method name. This method does not replace an existing handler, but rather adds the new handler to the existing chain of handlers.
Parameter methodName
The name of the delegate method to add a handler for.
Parameter handler
A function that will be called when the specified delegate method is called.

method addNotificationObserver

addNotificationObserver: (
    notificationName: string,
    onReceiveCallback: (notification: NSNotification) => void
) => NotificationObserver;

Adds an observer to the default notification center for the specified notification. For more information, please visit 'https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSNotificationCenter_Class/#//apple_ref/occ/instm/NSNotificationCenter/addObserver:selector:name:object:'
Parameter notificationName
A string containing the name of the notification.
Parameter onReceiveCallback
A callback function that will be called each time the observer receives a notification.

method removeNotificationObserver

removeNotificationObserver: (observer: any, notificationName: string) => any;

Removes the observer for the specified notification from the default notification center. For more information, please visit 'https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSNotificationCenter_Class/#//apple_ref/occ/instm/NSNotificationCenter/addObserver:selector:name:object:'
Parameter observer
The observer that was returned from the addNotificationObserver method.
Parameter notificationName
A string containing the name of the notification.
Parameter onReceiveCallback
A callback function that will be called each time the observer receives a notification.

class ItemSpec

class ItemSpec {}

Defines row/column specific properties that apply to GridLayout elements.

constructor

constructor();

constructor

constructor(value: number, type: GridUnitType);

property actualLength

actualLength: number;

Gets the actual length of an ItemSpec.

property gridUnitType

gridUnitType: GridUnitType;

Returns unit type of this ItemSpec instance.

property isAbsolute

isAbsolute: boolean;

Returns true if this ItemSpec instance holds an absolute (pixel) value.

property isAuto

isAuto: boolean;

Returns true if this GridLength instance is automatic (not specified).

property isStar

isStar: boolean;

Returns true if this ItemSpec instance holds weighted proportion of available space.

property value

value: number;

Returns value part of this ItemSpec instance.

class KeyframeAnimation

class KeyframeAnimation {}

property animations

animations: Keyframe[];

property cancel

cancel: () => void;

Cancels a playing animation.

property delay

delay: number;

The amount of time, in milliseconds, to delay starting the animation.

property isPlaying

isPlaying: boolean;

Returns true if the application is currently running.

property iterations

iterations: number;

Specifies how many times the animation should be played. Default is 1. iOS animations support fractional iterations, i.e. 1.5. To repeat an animation infinitely, use Number.POSITIVE_INFINITY

property play

play: (view: View) => Promise<void>;

Plays the animation.

method keyframeAnimationFromInfo

static keyframeAnimationFromInfo: (
    info: KeyframeAnimationInfo
) => KeyframeAnimation;

Creates a keyframe animation from animation definition.

class KeyframeAnimationInfo

class KeyframeAnimationInfo {}

Defines animation options for the View.animate method.

property curve

curve?: any;

An optional animation curve. Possible values are contained in the [AnimationCurve enumeration](../modules/_ui_enums_.animationcurve.html). Alternatively, you can pass an instance of type UIViewAnimationCurve for iOS or android.animation.TimeInterpolator for Android.

property delay

delay?: number;

The amount of time, in milliseconds, to delay starting the animation.

property duration

duration?: number;

The length of the animation in milliseconds. The default duration is 300 milliseconds.

property isForwards

isForwards: boolean;

Determines whether the animation values will be applied on the animated object after the animation finishes.

property isReverse

isReverse?: boolean;

If true the animation will be played backwards.

property iterations

iterations?: number;

Specifies how many times the animation should be played. Default is 1. iOS animations support fractional iterations, i.e. 1.5. To repeat an animation infinitely, use Number.POSITIVE_INFINITY

property keyframes

keyframes: KeyframeInfo[];

Return animation keyframes.

property name

name?: string;

The animation name.

class Label

class Label extends TextBase {}

Represents a text label.

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/widget/TextView.html) that represents the user interface for this component. Valid only when running on Android OS.

property ios

ios: any;

Gets the native [UILabel](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UILabel_Class/) that represents the user interface for this component. Valid only when running on iOS.

property textWrap

textWrap: boolean;

Gets or sets whether the Label wraps text or not.

class LayoutBase

class LayoutBase extends CustomLayoutView {}

Base class for all views that supports children positioning.

property clipToBounds

clipToBounds: boolean;

Gets or sets a value indicating whether to clip the content of this layout.

property isPassThroughParentEnabled

isPassThroughParentEnabled: boolean;

Gets or sets a value indicating whether touch event should pass through to a parent view of the layout container in case an interactive child view did not handle it. Default value of this property is false. This does not affect the appearance of the view.

property padding

padding: string | number | CoreTypes.LengthDipUnit | CoreTypes.LengthPxUnit;

Gets or sets padding style property.

property paddingBottom

paddingBottom: CoreTypes.LengthType;

Specify the bottom padding of this layout.

property paddingLeft

paddingLeft: CoreTypes.LengthType;

Specify the left padding of this layout.

property paddingRight

paddingRight: CoreTypes.LengthType;

Specify the right padding of this layout.

property paddingTop

paddingTop: CoreTypes.LengthType;

Specify the top padding of this layout.

method addChild

addChild: (view: View) => void;

Adds the view to children array.
Parameter view
The view to be added to the end of the children array.

method eachLayoutChild

eachLayoutChild: (callback: (child: View, isLast: boolean) => void) => void;

Calls the callback for each child that should be laid out.
Parameter callback
The callback

method getChildAt

getChildAt: (index: number) => View;

Returns the view at the specified position.
Parameter index
The position at which to get the child from.

method getChildIndex

getChildIndex: (child: View) => number;

Returns the position of the child view
Parameter child
The child view that we are looking for.

method getChildrenCount

getChildrenCount: () => number;

Returns the number of children in this Layout.

method insertChild

insertChild: (child: View, atIndex: number) => void;

Inserts the view to children array at the specified index.
Parameter view
The view to be added to the end of the children array.
Parameter atIndex
The insertion index.

method removeChild

removeChild: (view: View) => void;

Removes the specified view from the children array.
Parameter view
The view to remove from the children array.

method removeChildren

removeChildren: () => void;

Removes all views in this layout.

class ListPicker

class ListPicker extends View {}

Represents an list picker.

property android

android: any;

Gets the native [android.widget.NumberPicker](http://developer.android.com/reference/android/widget/NumberPicker.html) that represents the user interface for this component. Valid only when running on Android OS.

property ios

ios: any;

Gets the native iOS [UIPickerView](http://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UIDatePicker_Class/index.html) that represents the user interface for this component. Valid only when running on iOS.

property items

items: any;

Gets or set the items collection of the ListPicker. The items property can be set to an array or an object defining length and getItem(index) method.

property selectedIndex

selectedIndex: number;

Gets or sets the selected index.

class ListView

class ListView extends View {}

Represents a view that shows items in a vertically scrolling list.

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/widget/ListView.html) that represents the user interface for this component. Valid only when running on Android OS.

property ios

ios: any;

Gets the native [iOS view](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITableView_Class/) that represents the user interface for this component. Valid only when running on iOS.

property iosEstimatedRowHeight

iosEstimatedRowHeight: CoreTypes.LengthType;

Gets or set the estimated height of rows in the ListView. The default value is 44px.

property itemIdGenerator

itemIdGenerator: (item: any, index: number, items: any) => number;

Item id generator

property itemLoadingEvent

static itemLoadingEvent: string;

String value used when hooking to itemLoading event.

property items

items: any[] | ItemsSource;

Gets or set the items collection of the ListView. The items property can be set to an array or an object defining length and getItem(index) method.

property itemTapEvent

static itemTapEvent: string;

String value used when hooking to itemTap event.

property itemTemplate

itemTemplate: string | Template;

Gets or set the item template of the ListView.

property itemTemplates

itemTemplates: string | KeyedTemplate[];

Gets or set the list of item templates for the item template selector

property itemTemplateSelector

itemTemplateSelector:
    | string
    | ((item: any, index: number, items: any) => string);

A function that returns the appropriate ket template based on the data item.

property loadMoreItemsEvent

static loadMoreItemsEvent: string;

String value used when hooking to loadMoreItems event.

property rowHeight

rowHeight: CoreTypes.LengthType;

Gets or set row height of the ListView.

property separatorColor

separatorColor: Color;

Gets or set the items separator line color of the ListView.

method isItemAtIndexVisible

isItemAtIndexVisible: (index: number) => boolean;

Checks if Specified item with index is visible.
Parameter index
Item index.

method on

on: {
    (
        eventName: string,
        callback: (data: EventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'itemLoading',
        callback: (args: ItemEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'itemTap',
        callback: (args: ItemEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'loadMoreItems',
        callback: (args: EventData) => void,
        thisArg?: any
    ): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when a View for the data at the specified index should be created. The result should be returned trough the view property of the event data. Note, that the view property of the event data can be pre-initialized with an old instance of a view, so that it can be reused.
Raised when an item inside the ListView is tapped.
Raised when the ListView is scrolled so that its last item is visible.

method refresh

refresh: () => any;

Forces the ListView to reload all its items.

method scrollToIndex

scrollToIndex: (index: number) => any;

Scrolls the specified item with index into view. [iOS](https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UITableView_Class/#//apple_ref/occ/instm/UITableView/scrollToRowAtIndexPath:atScrollPosition:animated:) [Android](http://developer.android.com/reference/android/widget/ListView.html#setSelection(int))
Parameter index
Item index.

method scrollToIndexAnimated

scrollToIndexAnimated: (index: number) => any;

Scrolls the specified item with index into view with animation. [iOS](https://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UITableView_Class/#//apple_ref/occ/instm/UITableView/scrollToRowAtIndexPath:atScrollPosition:animated:) [Android](https://developer.android.com/reference/android/widget/ListView.html#smoothScrollToPosition(int))
Parameter index
Item index.

class ModalTransition

class ModalTransition extends Transition {}

class ModuleNameResolver

class ModuleNameResolver {}

constructor

constructor(context: PlatformContext, moduleListProvider?: ModuleListProvider);

method clearCache

clearCache: () => void;

method resolveModuleName

resolveModuleName: (path: string, ext: string) => string;

class NavigationButton

class NavigationButton extends ActionItem {}

Represents the navigation (a.k.a. "back") button.

class Observable

class Observable {}

Observable is used when you want to be notified when a change occurs. Use on/off methods to add/remove listener. Please note that should you be using the new Observable({}) constructor, it is **obsolete** since v3.0, and you have to migrate to the "data/observable" fromObject({}) or the fromObjectRecursive({}) functions.

property propertyChangeEvent

static propertyChangeEvent: string;

String value used when hooking to propertyChange event.

method addEventListener

static addEventListener: (
    eventName: string,
    callback: (data: EventData) => void,
    thisArg?: any,
    once?: boolean
) => void;

Adds a listener for the specified event name.
Parameter eventName
Name of the event to attach to.
Parameter callback
A function to be called when some of the specified event(s) is raised.
Parameter thisArg
An optional parameter which when set will be used as "this" in callback method call.
Please avoid using the static event-handling APIs as they will be removed in future.
Deprecated

method get

get: (name: string) => any;

Gets the value of the specified property.

method hasListeners

hasListeners: (eventName: string) => boolean;

Checks whether a listener is registered for the specified event name.
Parameter eventName
The name of the event to check for.

method notify

notify: <T extends Optional<EventData, 'object'>>(data: T) => void;

Notify this Observable instance with some data. This causes all event handlers on the Observable instance to be called, as well as any 'global' event handlers set on the instance's class.
Parameter data
an object that satisfies the EventData interface, though with an optional 'object' property. If left undefined, the 'object' property will implicitly be set as this Observable instance.

method notifyPropertyChange

notifyPropertyChange: (name: string, value: any, oldValue?: any) => void;

Notifies all the registered listeners for the property change event.

method off

static off: (
    eventName: string,
    callback?: (data: EventData) => void,
    thisArg?: any
) => void;

Removes the listener(s) for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
An optional specific event listener to remove (if omitted, all event listeners by this name will be removed).
Parameter thisArg
An optional parameter which, when set, will be used to refine search of the correct event listener to be removed.
Please avoid using the static event-handling APIs as they will be removed in future.
Deprecated

method on

static on: (
    eventName: string,
    callback: (data: EventData) => void,
    thisArg?: any,
    once?: boolean
) => void;

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Please avoid using the static event-handling APIs as they will be removed in future.
Deprecated

method once

static once: (
    eventName: string,
    callback: (data: EventData) => void,
    thisArg?: any
) => void;

Adds a listener for the specified event name, which, once fired, will remove itself.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Please avoid using the static event-handling APIs as they will be removed in future.
Deprecated

method removeEventListener

static removeEventListener: (
    eventName: string,
    callback?: (data: EventData) => void,
    thisArg?: any
) => void;

Removes listener(s) for the specified event name.
Parameter eventName
Name of the event to attach to.
Parameter callback
An optional parameter pointing to a specific listener. If not defined, all listeners for the event names will be removed.
Parameter thisArg
An optional parameter which when set will be used to refine search of the correct callback which will be removed as event listener.
Please avoid using the static event-handling APIs as they will be removed in future.
Deprecated

method set

set: (name: string, value: any) => void;

Updates the specified property with the provided value.

method setProperty

setProperty: (name: string, value: any) => void;

Updates the specified property with the provided value and raises a property change event and a specific change event based on the property name.

class ObservableArray

class ObservableArray<T> extends Observable {}

Advanced array like class used when you want to be notified when a change occurs.

constructor

constructor(arrayLength?: number);

Create ObservableArray with specified length.

constructor

constructor(items: T[]);

Create ObservableArray from source Array.

constructor

constructor(...items: T[]);

Create ObservableArray from T items.

property changeEvent

static changeEvent: string;

String value used when hooking to change event.

property length

length: number;

Gets or sets the length of the array. This is a number one higher than the highest element defined in an array.

method [Symbol.iterator]

[Symbol.iterator]: () => Generator<T, void, unknown>;

method concat

concat: (...args: any[]) => ObservableArray<T>;

Combines two or more arrays.
Parameter items
Additional items to add to the end of array1.

method every

every: (
    callbackfn: (value: T, index: number, array: ObservableArray<T>) => boolean,
    thisArg?: any
) => boolean;

Determines whether all the members of an array satisfy the specified test.
Parameter callbackfn
A function that accepts up to three arguments. The every method calls the callbackfn function for each element in array1 until the callbackfn returns false, or until the end of the array.
Parameter thisArg
An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

method filter

filter: (
    callbackfn: (value: T, index: number, array: ObservableArray<T>) => boolean,
    thisArg?: any
) => ObservableArray<T>;

Returns the elements of an array that meet the condition specified in a callback function.
Parameter callbackfn
A function that accepts up to three arguments. The filter method calls the callbackfn function one time for each element in the array.
Parameter thisArg
An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

method find

find: (
    callbackfn: (value: T, index: number, array: ObservableArray<T>) => any,
    thisArg?: any
) => T;

Returns the first element in the array where predicate is true, and null otherwise.
Parameter callbackfn
Parameter thisArg
If provided, it will be used as the this value for each invocation of predicate. If it is not provided, undefined is used instead.

method findIndex

findIndex: (
    callbackfn: (value: T, index: number, array: ObservableArray<T>) => any,
    thisArg?: any
) => number;

Returns the index of the first element in the array where predicate is true, and -1 otherwise.
Parameter callbackfn
Parameter thisArg
If provided, it will be used as the this value for each invocation of predicate. If it is not provided, undefined is used instead.

method forEach

forEach: (
    callbackfn: (value: T, index: number, array: ObservableArray<T>) => void,
    thisArg?: any
) => void;

Performs the specified action for each element in an array.
Parameter callbackfn
A function that accepts up to three arguments. forEach calls the callbackfn function one time for each element in the array.
Parameter thisArg
An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

method getItem

getItem: (pos: number) => T;

Returns item at specified position. Supports relative indexing from the end of the array when passed a negative index.

method includes

includes: (searchElement: T, fromIndex?: number) => boolean;

Determines whether the specified element exists inside the array.
Parameter searchElement
The value to locate in the array.
Parameter fromIndex
The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.

method indexOf

indexOf: (searchElement: T, fromIndex?: number) => number;

Returns the index of the first occurrence of a value in an array.
Parameter searchElement
The value to locate in the array.
Parameter fromIndex
The array index at which to begin the search. If fromIndex is omitted, the search starts at index 0.

method join

join: (separator?: string) => string;

Adds all the elements of an array separated by the specified separator string.
Parameter separator
A string used to separate one element of an array from the next in the resulting String. If omitted, the array elements are separated with a comma.

method lastIndexOf

lastIndexOf: (searchElement: T, fromIndex?: number) => number;

Returns the index of the last occurrence of a specified value in an array.
Parameter searchElement
The value to locate in the array.
Parameter fromIndex
The array index at which to begin the search. If fromIndex is omitted, the search starts at the last index in the array.

method map

map: <U>(
    callbackfn: (value: T, index: number, array: ObservableArray<T>) => U,
    thisArg?: any
) => ObservableArray<U>;

Calls a defined callback function on each element of an array, and returns an array that contains the results.
Parameter callbackfn
A function that accepts up to three arguments. The map method calls the callbackfn function one time for each element in the array.
Parameter thisArg
An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

method pop

pop: () => T;

Removes the last element from an array and returns it.

method push

push: (...args: T[]) => number;

Appends new elements to an array, and returns the new length of the array.
Parameter item
New element of the Array.

method reduce

reduce: (
    callbackfn: (
        previousValue: T,
        currentValue: T,
        currentIndex: number,
        array: ObservableArray<T>
    ) => T,
    initialValue?: T
) => T;

Calls the specified callback function for all the elements in an array. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
Parameter callbackfn
A function that accepts up to four arguments. The reduce method calls the callbackfn function one time for each element in the array.
Parameter initialValue
If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.

method reduceRight

reduceRight: (
    callbackfn: (
        previousValue: T,
        currentValue: T,
        currentIndex: number,
        array: ObservableArray<T>
    ) => T,
    initialValue?: T
) => T;

Calls the specified callback function for all the elements in an array, in descending order. The return value of the callback function is the accumulated result, and is provided as an argument in the next call to the callback function.
Parameter callbackfn
A function that accepts up to four arguments. The reduceRight method calls the callbackfn function one time for each element in the array.
Parameter initialValue
If initialValue is specified, it is used as the initial value to start the accumulation. The first call to the callbackfn function provides this value as an argument instead of an array value.

method reverse

reverse: () => ObservableArray<T>;

Reverses the elements in an Array. This method uses 'in place' algorithm.

method setItem

setItem: (pos: number, value: T) => void;

Sets item at specified position. Supports relative indexing from the end of the array when passed a negative index.

method shift

shift: () => T;

Removes the first element from an array and returns it.

method slice

slice: (start?: number, end?: number) => ObservableArray<T>;

Returns a section of an array.
Parameter start
The beginning of the specified portion of the array.
Parameter end
The end of the specified portion of the array.

method some

some: (
    callbackfn: (value: T, index: number, array: ObservableArray<T>) => boolean,
    thisArg?: any
) => boolean;

Determines whether the specified callback function returns true for any element of an array.
Parameter callbackfn
A function that accepts up to three arguments. The some method calls the callbackfn function for each element in array1 until the callbackfn returns true, or until the end of the array.
Parameter thisArg
An object to which the this keyword can refer in the callbackfn function. If thisArg is omitted, undefined is used as the this value.

method sort

sort: (compareFn?: (a: T, b: T) => number) => ObservableArray<T>;

Sorts an array. This method uses 'in place' algorithm.
Parameter compareFn
The name of the function used to determine the order of the elements. If omitted, the elements are sorted in ascending, ASCII character order.

method splice

splice: (
    start: number,
    deleteCount?: number,
    ...items: T[]
) => ObservableArray<T>;

Removes elements from an array and, if necessary, inserts new elements in their place, returning the deleted elements. This method uses 'in place' algorithm.
Parameter start
The zero-based location in the array from which to start removing elements.
Parameter deleteCount
The number of elements to remove.
Parameter items
Elements to insert into the array in place of the deleted elements.

method toJSON

toJSON: () => Array<any>;

method toLocaleString

toLocaleString: () => string;

method toString

toString: () => string;

Returns a string representation of an array.

method unshift

unshift: (...args: T[]) => number;

Inserts new elements at the start of an array.
Parameter items
Elements to insert at the start of the Array.

class Page

class Page extends PageBase {}

Represents a logical unit for navigation (inside Frame).

property accessibilityAnnouncePageEnabled

accessibilityAnnouncePageEnabled: boolean;

Should page changed be annnounced to the screen reader.

property actionBar

actionBar: ActionBar;

Gets the ActionBar for this page.

property actionBarHidden

actionBarHidden: boolean;

Used to hide the Navigation Bar in iOS and the Action Bar in Android.

property androidStatusBarBackground

androidStatusBarBackground: Color;

Gets or sets the color of the status bar in Android.

property backgroundSpanUnderStatusBar

backgroundSpanUnderStatusBar: boolean;

Gets or sets whether page background spans under status bar.

property enableSwipeBackNavigation

enableSwipeBackNavigation: boolean;

Used to control if swipe back navigation in iOS is enabled. This property is iOS specific. Default value: true

property frame

frame: Frame;

Gets the Frame object controlling this instance.

property hasActionBar

hasActionBar: boolean;

property navigatedFromEvent

static readonly navigatedFromEvent: string;

String value used when hooking to navigatedFrom event.

property navigatedToEvent

static readonly navigatedToEvent: string;

String value used when hooking to navigatedTo event.

property navigatingFromEvent

static readonly navigatingFromEvent: string;

String value used when hooking to navigatingFrom event.

property navigatingToEvent

static readonly navigatingToEvent: string;

String value used when hooking to navigatingTo event.

property navigationContext

navigationContext: any;

A property that is used to pass a data from another page (while navigate to).

property onAccessibilityPerformEscape

onAccessibilityPerformEscape?: () => boolean;

iOS Only Perform an action when user performans the "escape" gesture

property statusBarStyle

statusBarStyle: 'dark' | 'light';

Gets or sets the style of the status bar.

method accessibilityScreenChanged

accessibilityScreenChanged: (refocus?: boolean) => void;

Announce screen changed

method getKeyframeAnimationWithName

getKeyframeAnimationWithName: (animationName: string) => KeyframeAnimationInfo;

Returns a CSS keyframe animation with the specified name, if it exists.

method on

on: {
    (
        eventName: string,
        callback: (data: EventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'navigatingTo',
        callback: (args: NavigatedData) => void,
        thisArg?: any
    ): void;
    (
        event: 'navigatedTo',
        callback: (args: NavigatedData) => void,
        thisArg?: any
    ): void;
    (
        event: 'navigatingFrom',
        callback: (args: NavigatedData) => void,
        thisArg?: any
    ): void;
    (
        event: 'navigatedFrom',
        callback: (args: NavigatedData) => void,
        thisArg?: any
    ): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when navigation to the page has started.
Raised when navigation to the page has finished.
Raised when navigation from the page has started.
Raised when navigation from the page has finished.

method onNavigatedFrom

onNavigatedFrom: (isBackNavigation: boolean) => void;

A method called after navigated from the page.
Parameter isBackNavigation
True if the Page is being navigated from using the Frame.goBack() method, false otherwise.

method onNavigatedTo

onNavigatedTo: (isBackNavigation: boolean) => void;

A method called after navigated to the page.
Parameter isBackNavigation
True if the Page is being navigated from using the Frame.goBack() method, false otherwise.

method onNavigatingFrom

onNavigatingFrom: (isBackNavigation: boolean) => void;

A method called before navigating from the page.
Parameter isBackNavigation
True if the Page is being navigated from using the Frame.goBack() method, false otherwise.

method onNavigatingTo

onNavigatingTo: (
    context: any,
    isBackNavigation: boolean,
    bindingContext?: any
) => void;

A method called before navigating to the page.
Parameter context
The data passed to the page through the NavigationEntry.context property.
Parameter isBackNavigation
True if the Page is being navigated from using the Frame.goBack() method, false otherwise.
Parameter bindingContext
An object to become the binding context of the page navigating to. Optional.

class PageBase

class PageBase extends ContentView {}

property accessibilityAnnouncePageEnabled

accessibilityAnnouncePageEnabled: boolean;

property actionBar

actionBar: ActionBar;

property actionBarHidden

actionBarHidden: boolean;

property androidStatusBarBackground

androidStatusBarBackground: Color;

property backgroundSpanUnderStatusBar

backgroundSpanUnderStatusBar: boolean;

property enableSwipeBackNavigation

enableSwipeBackNavigation: boolean;

property frame

readonly frame: Frame;

property hasActionBar

hasActionBar: boolean;

property navigatedFromEvent

static navigatedFromEvent: string;

property navigatedToEvent

static navigatedToEvent: string;

property navigatingFromEvent

static navigatingFromEvent: string;

property navigatingToEvent

static navigatingToEvent: string;

property navigationContext

readonly navigationContext: any;

property page

readonly page: PageDefinition;

property statusBarStyle

statusBarStyle: 'dark' | 'light';

method accessibilityScreenChanged

accessibilityScreenChanged: (refocus?: boolean) => void;

method eachChildView

eachChildView: (callback: (child: View) => boolean) => void;

method getKeyframeAnimationWithName

getKeyframeAnimationWithName: (animationName: string) => KeyframeAnimationInfo;

method onNavigatedFrom

onNavigatedFrom: (isBackNavigation: boolean) => void;

method onNavigatedTo

onNavigatedTo: (isBackNavigation: boolean) => void;

method onNavigatingFrom

onNavigatingFrom: (isBackNavigation: boolean) => void;

method onNavigatingTo

onNavigatingTo: (
    context: any,
    isBackNavigation: boolean,
    bindingContext?: any
) => void;

class PageTransition

class PageTransition extends Transition {}

constructor

constructor(duration?: number, nativeCurve?: any, pageLoadedTimeout?: number);

class ParserEventType

class ParserEventType {}

Specifies the type of parser event.

property CDATA

static CDATA: string;

Specifies the CDATA event type.

property Comment

static Comment: string;

Specifies the Comment event type.

property EndElement

static EndElement: string;

Specifies the EndElement event type.

property StartElement

static StartElement: string;

Specifies the StartElement event type.

property Text

static Text: string;

Specifies the Text event type.

class Placeholder

class Placeholder extends View {}

Represents a Placeholder, which is used to add a native view to the visual tree.

property creatingViewEvent

static creatingViewEvent: string;

String value used when hooking to creatingView event.

method on

on: {
    (
        eventName: string,
        callback: (args: EventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'creatingView',
        callback: (args: CreateViewEventData) => void,
        thisArg?: any
    ): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when a creatingView event occurs.

class Progress

class Progress extends View {}

Represents a progress component.

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/widget/ProgressBar.html) that represents the user interface for this component. Valid only when running on Android OS.

property ios

ios: any;

Gets the native iOS [UIProgressView](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIProgressView_Class/) that represents the user interface for this component. Valid only when running on iOS.

property maxValue

maxValue: number;

Gets or sets a progress max value.

property value

value: number;

Gets or sets a progress current value.

class Property

class Property<T extends ViewBase, U>
    implements TypedPropertyDescriptor<U>, Property<T, U> {}

constructor

constructor(options: PropertyOptions<T, U>);

property configurable

configurable: boolean;

property defaultValue

readonly defaultValue: {};

property defaultValueKey

readonly defaultValueKey: Symbol;

property enumerable

enumerable: boolean;

property get

get: () => U;

property getDefault

readonly getDefault: Symbol;

property isStyleProperty

isStyleProperty: boolean;

property key

readonly key: Symbol;

property name

readonly name: string;

property nativeValueChange

readonly nativeValueChange: (owner: T, value: U) => void;

property overrideHandlers

overrideHandlers: (options: PropertyOptions<T, U>) => void;

property set

set: (value: U) => void;

property setNative

readonly setNative: Symbol;

method isSet

isSet: (instance: T) => boolean;

method register

register: (cls: { prototype: T }) => void;

class ProxyViewContainer

class ProxyViewContainer extends LayoutBase {}

Proxy view container that adds all its native children directly to the parent. To be used as a logical grouping container of views.

constructor

constructor();

property android

readonly android: any;

property ios

readonly ios: any;

property isLayoutRequested

readonly isLayoutRequested: boolean;

method createNativeView

createNativeView: () => any;

class Repeater

class Repeater extends CustomLayoutView {}

Represents a UI Repeater component.

constructor

constructor();

property android

android: any;

property ios

ios: any;

property items

items: any[] | ItemsSource;

Gets or set the items collection of the Repeater. The items property can be set to an array or an object defining length and getItem(index) method.

property itemsLayout

itemsLayout: LayoutBase;

Gets or set the items layout of the Repeater. Default value is StackLayout with orientation="vertical".

property itemTemplate

itemTemplate: string | Template;

Gets or set the item template of the Repeater.

property itemTemplates

itemTemplates: string | KeyedTemplate[];

Gets or set the item templates of the Repeater.

property itemTemplateSelector

itemTemplateSelector:
    | string
    | ((item: any, index: number, items: any) => string);

property knownFunctions

static knownFunctions: string[];

method eachChildView

eachChildView: (callback: (child: View) => boolean) => void;

method onLayout

onLayout: (left: number, top: number, right: number, bottom: number) => void;

method onLoaded

onLoaded: () => void;

method onMeasure

onMeasure: (widthMeasureSpec: number, heightMeasureSpec: number) => void;

method refresh

refresh: () => void;

Forces the Repeater to reload all its items.

class RootLayout

class RootLayout extends GridLayout {}

method bringToFront

bringToFront: (view: View, animated?: boolean) => Promise<void>;

method close

close: (view: View, exitTo?: TransitionAnimation) => Promise<void>;

method closeAll

closeAll: () => Promise<void[]>;

method closeShadeCover

closeShadeCover: (shadeCoverOptions?: ShadeCoverOptions) => Promise<void>;

method getShadeCover

getShadeCover: () => View;

method open

open: (view: View, options?: RootLayoutOptions) => Promise<void>;

method openShadeCover

openShadeCover: (options?: ShadeCoverOptions) => Promise<void>;

method topmost

topmost: () => View;

class Screen

class Screen {}

An object describing general information about a display.

property mainScreen

static mainScreen: ScreenMetrics;

Gets information about the main screen of the current device.

class ScrollView

class ScrollView extends ContentView {}

Represents a scrollable area that can have content that is larger than its bounds.

property horizontalOffset

horizontalOffset: number;

Gets a value that contains the horizontal offset of the scrolled content.

property isScrollEnabled

isScrollEnabled: boolean;

Gets or sets a value indicating whether scroll is enabled.

property orientation

orientation: CoreTypes.OrientationType;

Gets or sets direction in which the content can be scrolled.

property scrollableHeight

scrollableHeight: number;

Gets the maximum value for the verticalOffset.

property scrollableWidth

scrollableWidth: number;

Gets the maximum value for the horizontalOffset.

property scrollBarIndicatorVisible

scrollBarIndicatorVisible: boolean;

Toggles scrollbar indicator visibility

property scrollEvent

static scrollEvent: string;

String value used when hooking to scroll event.

property verticalOffset

verticalOffset: number;

Gets a value that contains the vertical offset of the scrolled content.

method on

on: {
    (
        eventName: string,
        callback: (data: EventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'scroll',
        callback: (args: ScrollEventData) => void,
        thisArg?: any
    ): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when a scroll event occurs.

method scrollToHorizontalOffset

scrollToHorizontalOffset: (value: number, animated: boolean) => any;

Scrolls the content the specified horizontal offset position.
Parameter value
The offset value
Parameter animated
true for animated scroll, false for immediate scroll.

method scrollToVerticalOffset

scrollToVerticalOffset: (value: number, animated: boolean) => any;

Scrolls the content the specified vertical offset position.
Parameter value
The offset value
Parameter animated
true for animated scroll, false for immediate scroll.

class SearchBar

class SearchBar extends View {}

Represents a search bar component.

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/widget/SearchView.html) that represents the user interface for this component. Valid only when running on Android OS.

property clearEvent

static clearEvent: string;

String value used when hooking to clear event.

property hint

hint: string;

Gets or sets the text of the search bar text field hint/placeholder.

property ios

ios: any;

Gets the native iOS [UISearchBar](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UISearchBar_Class/) that represents the user interface for this component. Valid only when running on iOS.

property submitEvent

static submitEvent: string;

String value used when hooking to submit event.

property text

text: string;

Gets or sets a search bar text.

property textFieldBackgroundColor

textFieldBackgroundColor: Color;

Gets or sets the TextField background color of the SearchBar component.

property textFieldHintColor

textFieldHintColor: Color;

Gets or sets the TextField Hint color of the SearchBar component.

method dismissSoftInput

dismissSoftInput: () => void;

Hides the soft input method, usually a soft keyboard.

method on

on: {
    (
        eventName: string,
        callback: (data: EventData) => void,
        thisArg?: any
    ): void;
    (event: 'submit', callback: (args: EventData) => void, thisArg?: any): void;
    (event: 'close', callback: (args: EventData) => void, thisArg?: any): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when a search bar search is submitted.
Raised when a search bar search is closed.

class SegmentedBar

class SegmentedBar
    extends View
    implements AddChildFromBuilder, AddArrayFromBuilder {}

Represents a UI SegmentedBar component.

property items

items: SegmentedBarItem[];

Gets or sets the items of the SegmentedBar.

property selectedBackgroundColor

selectedBackgroundColor: Color;

Gets or sets the selected background color of the SegmentedBar component.

property selectedIndex

selectedIndex: number;

Gets or sets the selected index of the SegmentedBar component.

property selectedIndexChangedEvent

static selectedIndexChangedEvent: string;

String value used when hooking to the selectedIndexChanged event.

property selectedTextColor

selectedTextColor: Color;

Gets or sets the selected text color of the SegmentedBar component.

method on

on: {
    (
        eventName: string,
        callback: (data: EventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'selectedIndexChanged',
        callback: (args: SelectedIndexChangedEventData) => void,
        thisArg?: any
    ): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when the selected index changes.

class SegmentedBarItem

class SegmentedBarItem extends ViewBase {}

Represents a SegmentedBar item.

property title

title: string;

Gets or sets the title of the SegmentedBarItem.

class SharedTransition

class SharedTransition {}

Shared Element Transitions (preview) Allows you to auto animate between shared elements on two different screesn to create smooth navigational experiences. View components can define sharedTransitionTag="name" alone with a transition through this API.

property DEBUG

static DEBUG: boolean;

Enable to see various console logging output of Shared Element Transition behavior.

property finishedEvent

static finishedEvent: string;

When the transition finishes.

property inProgress

static inProgress: boolean;

Whether a transition is in progress or not. Note: used internally however exposed in case custom state ordering is needed. Updated when transitions start/end/cancel.

property interactiveCancelledEvent

static interactiveCancelledEvent: string;

When the interactive transition cancels.

property interactiveUpdateEvent

static interactiveUpdateEvent: string;

When the interactive transition updates with the percent value.

property startedEvent

static startedEvent: string;

When the transition starts.

method custom

static custom: (
    transition: Transition,
    options?: SharedTransitionConfig
) => { instance: Transition };

Configure a custom transition with presentation/dismissal options.
Parameter transition
The custom Transition instance.
Parameter options
Returns
a configured SharedTransition instance for use with navigational APIs.

method events

static events: () => SharedTransitionObservable;

Listen to various shared element transition events.
Returns
Observable

method finishState

static finishState: (id: number) => void;

Finish transition state.
Parameter id
Transition instance id

method getSharedElements

static getSharedElements: (
    fromPage: ViewBase,
    toPage: ViewBase
) => {
    sharedElements: Array<View>;
    presented: Array<View>;
    presenting: Array<View>;
};

Gather view collections based on sharedTransitionTag details.
Parameter fromPage
Page moving away from
Parameter toPage
Page moving to
Returns
Collections of views pertaining to shared elements or particular pages

method getState

static getState: (id: number) => SharedTransitionState;

Get current state for any transition.
Parameter id
Transition instance id

method notifyEvent

static notifyEvent: (
    eventName: string,
    data: SharedTransitionEventDataPayload
) => void;

Notify a Shared Transition event.
Parameter id
transition instance id
Parameter eventName
Shared Transition event name
Parameter type
TransitionNavigationType
Parameter action
SharedTransitionEventAction

method updateState

static updateState: (id: number, state: SharedTransitionState) => void;

Update transition state.
Parameter id
Transition instance id
Parameter state
SharedTransitionState

class SharedTransitionHelper

class SharedTransitionHelper {}

Platform helper to aid in creating your own custom Shared Element Transition classes. (iOS Only)

method animate

static animate: (
    state: SharedTransitionState,
    transitionContext: any,
    type: TransitionNavigationType
) => void;

method interactiveCancel

static interactiveCancel: (
    state: SharedTransitionState,
    interactiveState: TransitionInteractiveState,
    type: TransitionNavigationType
) => void;

method interactiveFinish

static interactiveFinish: (
    state: SharedTransitionState,
    interactiveState: TransitionInteractiveState,
    type: TransitionNavigationType
) => void;

method interactiveStart

static interactiveStart: (
    state: SharedTransitionState,
    interactiveState: TransitionInteractiveState,
    type: TransitionNavigationType
) => void;

method interactiveUpdate

static interactiveUpdate: (
    state: SharedTransitionState,
    interactiveState: TransitionInteractiveState,
    type: TransitionNavigationType,
    percent: number
) => void;

class ShorthandProperty

class ShorthandProperty<T extends Style, P> implements ShorthandProperty<T, P> {}

constructor

constructor(options: ShorthandPropertyOptions<P>);

property cssLocalName

readonly cssLocalName: string;

property cssName

readonly cssName: string;

property cssValueDescriptor

protected readonly cssValueDescriptor: PropertyDescriptor;

property key

readonly key: Symbol;

property localValueDescriptor

protected readonly localValueDescriptor: PropertyDescriptor;

property name

readonly name: string;

property propertyBagDescriptor

protected readonly propertyBagDescriptor: PropertyDescriptor;

property sourceKey

readonly sourceKey: Symbol;

method register

register: (cls: typeof Style) => void;

class Slider

class Slider extends View {}

Represents a slider component.

property accessibilityDecrementEvent

static readonly accessibilityDecrementEvent: string;

property accessibilityIncrementEvent

static readonly accessibilityIncrementEvent: string;

property accessibilityStep

accessibilityStep: number;

Increase/Decrease step size for iOS Increment-/Decrement events

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/widget/SeekBar.html) that represents the user interface for this component. Valid only when running on Android OS.

property ios

ios: any;

Gets the native iOS [UISlider](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UISlider_Class/) that represents the user interface for this component. Valid only when running on iOS.

property maxValue

maxValue: number;

Gets or sets a slider max value. The default value is 100.

property minValue

minValue: number;

Gets or sets a slider min value. The default value is 0.

property value

value: number;

Gets or sets a slider current value. The default value is 0.

class SlideTransition

class SlideTransition extends Transition {}

constructor

constructor(direction: string, duration?: number, nativeCurve?: any);

class Span

class Span extends ViewBase {}

A class used to create a single part of formatted string with a common text properties.

property backgroundColor

backgroundColor: Color;

Gets or sets the font background color of the span.

property color

color: Color;

Gets or sets the font foreground color of the span.

property fontFamily

fontFamily: string;

Gets or sets the font family of the span.

property fontSize

fontSize: number;

Gets or sets the font size of the span.

property fontStyle

fontStyle: FontStyleType;

Gets or sets the font style of the span.

property fontVariationSettings

fontVariationSettings: FontVariationSettingsType[];

Gets or sets the font variation settings of the span.

property fontWeight

fontWeight: FontWeightType;

Gets or sets the font weight of the span.

property iosAccessibilityAdjustsFontSize

iosAccessibilityAdjustsFontSize: boolean;

Defines whether accessibility font scale should affect font size.

property iosAccessibilityMaxFontScale

iosAccessibilityMaxFontScale: number;

Gets or sets the maximum accessibility font scale.

property iosAccessibilityMinFontScale

iosAccessibilityMinFontScale: number;

Gets or sets the minimum accessibility font scale.

property linkTapEvent

static linkTapEvent: string;

String value used when hooking to linkTap event.

property tappable

readonly tappable: boolean;

Gets if the span is tappable or not.

property text

text: string;

Gets or sets the text for the span.

property textDecoration

textDecoration: CoreTypes.TextDecorationType;

Gets or sets text decorations for the span.

class StackLayout

class StackLayout extends LayoutBase {}

A Layout that arranges its children horizontally or vertically. The direction can be set by orientation property.

property orientation

orientation: CoreTypes.OrientationType;

Gets or sets if layout should be horizontal or vertical. The default value is vertical.

class Style

class Style extends Observable implements StyleDefinition {}

constructor

constructor(ownerView: ViewBase | WeakRef<ViewBase>);

property accessibilityHidden

accessibilityHidden: boolean;

property accessibilityLanguage

accessibilityLanguage: string;

property accessibilityLiveRegion

accessibilityLiveRegion: AccessibilityLiveRegion;

property accessibilityMediaSession

accessibilityMediaSession: boolean;

property accessibilityRole

accessibilityRole: AccessibilityRole;

property accessibilityState

accessibilityState: AccessibilityState;

property accessibilityStep

accessibilityStep: number;

property accessible

accessible: boolean;

property alignContent

alignContent: AlignContent;

property alignItems

alignItems: AlignItems;

property alignSelf

alignSelf: AlignSelf;

property androidContentInset

androidContentInset:
    | string
    | number
    | CoreTypes.LengthDipUnit
    | CoreTypes.LengthPxUnit;

property androidContentInsetLeft

androidContentInsetLeft: CoreTypes.LengthType;

property androidContentInsetRight

androidContentInsetRight: CoreTypes.LengthType;

property androidDynamicElevationOffset

androidDynamicElevationOffset: number;

property androidElevation

androidElevation: number;

property androidSelectedTabHighlightColor

androidSelectedTabHighlightColor: Color;

property androidStatusBarBackground

androidStatusBarBackground: Color;

property background

background: string;

property backgroundColor

backgroundColor: Color;

property backgroundImage

backgroundImage: string | LinearGradient;

property backgroundInternal

backgroundInternal: Background;

property backgroundPosition

backgroundPosition: string;

property backgroundRepeat

backgroundRepeat: CoreTypes.BackgroundRepeatType;

property backgroundSize

backgroundSize: string;

property borderBottomColor

borderBottomColor: Color;

property borderBottomLeftRadius

borderBottomLeftRadius: CoreTypes.LengthType;

property borderBottomRightRadius

borderBottomRightRadius: CoreTypes.LengthType;

property borderBottomWidth

borderBottomWidth: CoreTypes.LengthType;

property borderColor

borderColor: string | Color;

property borderLeftColor

borderLeftColor: Color;

property borderLeftWidth

borderLeftWidth: CoreTypes.LengthType;

property borderRadius

borderRadius: string | number | CoreTypes.LengthDipUnit | CoreTypes.LengthPxUnit;

property borderRightColor

borderRightColor: Color;

property borderRightWidth

borderRightWidth: CoreTypes.LengthType;

property borderTopColor

borderTopColor: Color;

property borderTopLeftRadius

borderTopLeftRadius: CoreTypes.LengthType;

property borderTopRightRadius

borderTopRightRadius: CoreTypes.LengthType;

property borderTopWidth

borderTopWidth: CoreTypes.LengthType;

property borderWidth

borderWidth: string | number | CoreTypes.LengthDipUnit | CoreTypes.LengthPxUnit;

property boxShadow

boxShadow: ShadowCSSValues;

property clipPath

clipPath: string;

property color

color: Color;

property flexDirection

flexDirection: FlexDirection;

property flexGrow

flexGrow: number;

property flexShrink

flexShrink: number;

property flexWrap

flexWrap: FlexWrap;

property flexWrapBefore

flexWrapBefore: boolean;

property font

font: string;

property fontFamily

fontFamily: string;

property fontInternal

fontInternal: Font;

property fontScaleInternal

fontScaleInternal: number;

This property ensures inheritance of a11y scale among views.

property fontSize

fontSize: number;

property fontStyle

fontStyle: FontStyleType;

property fontVariationSettings

fontVariationSettings: FontVariationSettingsType[];

property fontWeight

fontWeight: FontWeightType;

property height

height: CoreTypes.PercentLengthType;

property horizontalAlignment

horizontalAlignment: CoreTypes.HorizontalAlignmentType;

property iosAccessibilityAdjustsFontSize

iosAccessibilityAdjustsFontSize: boolean;

property iosAccessibilityMaxFontScale

iosAccessibilityMaxFontScale: number;

property iosAccessibilityMinFontScale

iosAccessibilityMinFontScale: number;

property justifyContent

justifyContent: JustifyContent;

property letterSpacing

letterSpacing: number;

property lineHeight

lineHeight: number;

property margin

margin:
    | string
    | number
    | CoreTypes.LengthDipUnit
    | CoreTypes.LengthPxUnit
    | CoreTypes.LengthPercentUnit;

property marginBottom

marginBottom: CoreTypes.PercentLengthType;

property marginLeft

marginLeft: CoreTypes.PercentLengthType;

property marginRight

marginRight: CoreTypes.PercentLengthType;

property marginTop

marginTop: CoreTypes.PercentLengthType;

property maxLines

maxLines: number;

property minHeight

minHeight: CoreTypes.LengthType;

property minWidth

minWidth: CoreTypes.LengthType;

property opacity

opacity: number;

property order

order: number;

property padding

padding: string | number | CoreTypes.LengthDipUnit | CoreTypes.LengthPxUnit;

property paddingBottom

paddingBottom: CoreTypes.LengthType;

property paddingLeft

paddingLeft: CoreTypes.LengthType;

property paddingRight

paddingRight: CoreTypes.LengthType;

property paddingTop

paddingTop: CoreTypes.LengthType;

property perspective

perspective: number;

property placeholderColor

placeholderColor: Color;

property PropertyBag

PropertyBag: {
    new (): { [property: string]: string };
    prototype: { [property: string]: string };
};

property rotate

rotate: number;

property rotateX

rotateX: number;

property rotateY

rotateY: number;

property scaleX

scaleX: number;

property scaleY

scaleY: number;

property selectedBackgroundColor

selectedBackgroundColor: Color;

property selectedTabTextColor

selectedTabTextColor: Color;

property selectedTextColor

selectedTextColor: Color;

property separatorColor

separatorColor: Color;

property statusBarStyle

statusBarStyle: 'dark' | 'light';

property tabBackgroundColor

tabBackgroundColor: Color;

property tabTextColor

tabTextColor: Color;

property tabTextFontSize

tabTextFontSize: number;

property textAlignment

textAlignment: CoreTypes.TextAlignmentType;

property textDecoration

textDecoration: CoreTypes.TextDecorationType;

property textOverflow

textOverflow: CoreTypes.TextOverflowType;

property textShadow

textShadow: ShadowCSSValues;

property textStroke

textStroke: StrokeCSSValues;

property textTransform

textTransform: CoreTypes.TextTransformType;

property tintColor

tintColor: Color;

property translateX

translateX: number;

property translateY

translateY: number;

property verticalAlignment

verticalAlignment: CoreTypes.VerticalAlignmentType;

property view

readonly view: ViewBase;

property viewRef

viewRef: WeakRef<ViewBase>;

property visibility

visibility: CoreTypes.VisibilityType;

property whiteSpace

whiteSpace: CoreTypes.WhiteSpaceType;

property width

width: CoreTypes.PercentLengthType;

property zIndex

zIndex: number;

method getCssVariable

getCssVariable: (varName: string) => string | null;

method removeScopedCssVariable

removeScopedCssVariable: (varName: string) => void;

method removeUnscopedCssVariable

removeUnscopedCssVariable: (varName: string) => void;

method resetScopedCssVariables

resetScopedCssVariables: () => void;

method resetUnscopedCssVariables

resetUnscopedCssVariables: () => void;

method setScopedCssVariable

setScopedCssVariable: (varName: string, value: string) => void;

method setUnscopedCssVariable

setUnscopedCssVariable: (varName: string, value: string) => void;

method toString

toString: () => string;

class Switch

class Switch extends View {}

Represents a switch component.

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/widget/Switch.html) that represents the user interface for this component. Valid only when running on Android OS.

property checked

checked: boolean;

Gets or sets if a switch is checked or not.

property checkedChangeEvent

static checkedChangeEvent: string;

property ios

ios: any;

Gets the native iOS [UISwitch](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UISwitch_Class/) that represents the user interface for this component. Valid only when running on iOS.

property offBackgroundColor

offBackgroundColor: Color;

Gets or sets the background color of the Switch when it is turned off.

class TabView

class TabView extends View {}

Represents a tab view.

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/support/v4/view/ViewPager.html) that represents the user interface for this component. Valid only when running on Android OS.

property androidIconRenderingMode

androidIconRenderingMode: 'alwaysOriginal' | 'alwaysTemplate';

Gets or sets the rendering mode of tab icons on Android. Defaults to "original" Valid values are: - alwaysOriginal - alwaysTemplate

property androidOffscreenTabLimit

androidOffscreenTabLimit: number;

Gets or sets the number of tabs that should be retained to either side of the current tab in the view hierarchy in an idle state. Tabs beyond this limit will be recreated from the TabView when needed.

property androidSelectedTabHighlightColor

androidSelectedTabHighlightColor: Color;

Gets or sets the color of the horizontal line drawn below the currently selected tab on Android.

property androidSwipeEnabled

androidSwipeEnabled: boolean;

Gets or sets a value indicating whether swipe gesture is enabled for Android.

property androidTabsPosition

androidTabsPosition: 'top' | 'bottom';

Gets or set the tabs vertical position. Valid values are: - top - bottom

property ios

ios: any;

Gets the native iOS [UITabBarController](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITabBarController_Class/) that represents the user interface for this component. Valid only when running on iOS.

property iosIconRenderingMode

iosIconRenderingMode: 'automatic' | 'alwaysOriginal' | 'alwaysTemplate';

Gets or set the UIImageRenderingMode of the tab icons in iOS. Defaults to "automatic" Valid values are: - automatic - alwaysOriginal - alwaysTemplate

property items

items: TabViewItem[];

Gets or sets the items of the TabView.

property selectedIndex

selectedIndex: number;

Gets or sets the selectedIndex of the TabView.

property selectedIndexChangedEvent

static selectedIndexChangedEvent: string;

String value used when hooking to the selectedIndexChanged event.

property selectedTabTextColor

selectedTabTextColor: Color;

Gets or sets the text color of the selected tab title.

property tabBackgroundColor

tabBackgroundColor: Color;

Gets or sets the background color of the tabs.

property tabTextColor

tabTextColor: Color;

Gets or sets the text color of the tabs titles.

property tabTextFontSize

tabTextFontSize: number;

Gets or sets the font size of the tabs titles.

method on

on: {
    (
        eventName: string,
        callback: (data: EventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'selectedIndexChanged',
        callback: (args: SelectedIndexChangedEventData) => void,
        thisArg?: any
    ): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when the selected index changes.

class TabViewItem

class TabViewItem extends ViewBase {}

Represents a tab view entry.

property canBeLoaded

canBeLoaded?: boolean;

property iconSource

iconSource: string;

Gets or sets the icon source of the TabViewItem. This could either be a a file name or resource id.

property textTransform

textTransform: CoreTypes.TextTransformType;

Gets or sets the text transform of the tab titles.

property title

title: string;

Gets or sets the title of the TabViewItem.

property view

view: View;

Gets or sets the view of the TabViewItem.

class TextBase

class TextBase extends View implements AddChildFromBuilder {}

property fontSize

fontSize: number;

Gets or sets font-size style property.

property formattedText

formattedText: FormattedString;

Gets or sets a formatted string.

property iosTextAnimation

iosTextAnimation: boolean | 'inherit';

Specify wether the native text should be applied with or without animations

property iosTextAnimationFallback

static iosTextAnimationFallback: boolean;

The value used when the iosTextAnimation is set to 'inherit'

property letterSpacing

letterSpacing: number;

Gets or sets letterSpace style property.

property lineHeight

lineHeight: number;

Gets or sets lineHeight style property.

property maxLines

maxLines: number;

Gets or sets white space style property.

property nativeTextViewProtected

readonly nativeTextViewProtected: any;

Gets of the text widget. In some cases(android TextInputLayout) the TextView is made of 2 views: the layout and the text view So we need a different getter for the layout and text functions

property padding

padding: string | number | CoreTypes.LengthDipUnit | CoreTypes.LengthPxUnit;

Gets or sets padding style property.

property paddingBottom

paddingBottom: CoreTypes.LengthType;

Specify the bottom padding of this layout.

property paddingLeft

paddingLeft: CoreTypes.LengthType;

Specify the left padding of this layout.

property paddingRight

paddingRight: CoreTypes.LengthType;

Specify the right padding of this layout.

property paddingTop

paddingTop: CoreTypes.LengthType;

Specify the top padding of this layout.

property text

text: string;

Gets or sets the text.

property textAlignment

textAlignment: CoreTypes.TextAlignmentType;

Gets or sets text-alignment style property.

property textDecoration

textDecoration: CoreTypes.TextDecorationType;

Gets or sets text decorations style property.

property textOverflow

textOverflow: CoreTypes.TextOverflowType;

Gets or sets text-overflow style property.

property textShadow

textShadow: ShadowCSSValues;

Gets or sets text shadow style property.

property textTransform

textTransform: CoreTypes.TextTransformType;

Gets or sets text transform style property.

property whiteSpace

whiteSpace: CoreTypes.WhiteSpaceType;

Gets or sets white space style property.

class TextField

class TextField extends EditableTextBase {}

Represents an editable text field.

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/widget/EditText.html) that represents the user interface for this component. Valid only when running on Android OS.

property closeOnReturn

closeOnReturn: boolean;

Gets or sets if a text field should dismiss on return.

property ios

ios: any;

Gets the native iOS [UITextField](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITextField_Class/) that represents the user interface for this component. Valid only when running on iOS.

property returnPressEvent

static returnPressEvent: string;

property secure

secure: boolean;

Gets or sets if a text field is for password entry.

property secureWithoutAutofill

secureWithoutAutofill: boolean;

iOS only (to avoid 12+ auto suggested strong password handling)

class TextView

class TextView extends EditableTextBase {}

Represents an editable multiline text view.

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/widget/EditText.html) that represents the user interface for this component. Valid only when running on Android OS.

property ios

ios: any;

Gets the native iOS [UITextView](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITextView_Class/) that represents the user interface for this component. Valid only when running on iOS.

property maxLines

maxLines: number;

Limits input to a certain number of lines.

class TimePicker

class TimePicker extends View {}

Represents an time picker.

property android

android: any;

Gets the native [android.widget.TimePicker](http://developer.android.com/reference/android/widget/TimePicker.html) that represents the user interface for this component. Valid only when running on Android OS.

property hour

hour: number;

Gets or sets the time hour.

property ios

ios: any;

Gets the native iOS [UIDatePicker](http://developer.apple.com/library/prerelease/ios/documentation/UIKit/Reference/UIDatePicker_Class/index.html) that represents the user interface for this component. Valid only when running on iOS.

property iosPreferredDatePickerStyle

iosPreferredDatePickerStyle: number;

Gets or set the UIDatePickerStyle of the date picker in iOS 13.4+. Defaults to 0. Valid values are numbers: - 0: automatic (system picks the concrete style based on the current platform and date picker mode) - 1: wheels (the date picker displays as a wheel picker) - 2: compact (the date picker displays as a label that when tapped displays a calendar-style editor) - 3: inline (the date pickers displays as an inline, editable field)

property maxHour

maxHour: number;

Gets or sets the max time hour.

property maxMinute

maxMinute: number;

Gets or sets the max time minute.

property minHour

minHour: number;

Gets or sets the min time hour.

property minMinute

minMinute: number;

Gets or sets the min time minute.

property minute

minute: number;

Gets or sets the time minute.

property minuteInterval

minuteInterval: number;

Gets or sets the minute interval.

property time

time: Date;

Gets or sets the time.

class TouchManager

class TouchManager {}

Manage interactivity in your apps easily with TouchManager. Store reusable down/up animation settings for touches as well as optionally enable automatic tap (down/up) animations for your app.

property animations

static animations: TouchAnimationOptions;

Define reusable touch animations to use on views with touchAnimation defined or with enableGlobalTapAnimations on.

property enableGlobalHoverWhereTap

static enableGlobalHoverWhereTap: boolean;

(visionOS Only) Enable hoverStyle for all tap bindings in the UI.

property enableGlobalTapAnimations

static enableGlobalTapAnimations: boolean;

Enable animations for all tap bindings in the UI.

property touchAnimationDefinitions

static touchAnimationDefinitions: {
    view: View;
    animation: Animation;
    type: TouchAnimationTypes;
}[];

When using NativeScript AnimationDefinition's for touch animations this will contain any instances for finer grain control of starting/stopping under various circumstances. The TouchManager uses this internally but makes public for other versatility if needed.

property touchHandlers

static touchHandlers: { view: View; handler: any }[];

Native Touch handlers (iOS only) registered with the view through the TouchManager. The TouchManager uses this internally but makes public for other versatility if needed.

property visionHoverOptions

static visionHoverOptions: { [key: string]: VisionHoverOptions };

Define reusable hover styles keyed by name to use throughout your UI.

property visionHoverStyleCache

static visionHoverStyleCache: { [key: string]: UIHoverStyle };

Used internally - defines reusable UIHoverStyle's

method addAnimations

static addAnimations: (view: View) => void;

The TouchManager uses this internally. Adds touch animations to view based upon it's touchAnimation property or TouchManager.animations.
Parameter view
NativeScript view instance

method addHoverStyle

static addHoverStyle: (view: View) => void;

The TouchManager uses this internally. Adds visionOS hover styles to views based upon it's visionHoverStyle property
Parameter view
NativeScript view instance

method startAnimationForType

static startAnimationForType: (view: View, type: TouchAnimationTypes) => void;

class Transition

class Transition {}

constructor

constructor(duration?: number, nativeCurve?: any);

property AndroidTransitionType

static AndroidTransitionType?: {
    enter?: string;
    exit?: string;
    popEnter?: string;
    popExit?: string;
};

property id

id: number;

property interactiveController

interactiveController?: any;

property name

name?: string;

(Optional) Provide a unique name to identify this transition

property presented

presented?: any;

property presenting

presenting?: any;

property sharedElements

sharedElements?: {
    presented?: Array<SharedElementSettings>;
    presenting?: Array<SharedElementSettings>;
    independent?: Array<SharedElementSettings & { isPresented?: boolean }>;
};

property transitionController

transitionController?: any;

method androidFragmentTransactionCallback

androidFragmentTransactionCallback: (
    fragmentTransaction: any,
    currentEntry: BackstackEntry,
    newEntry: BackstackEntry
) => void;

method animateIOSTransition

animateIOSTransition: (
    transitionContext: any,
    fromViewCtrl: any,
    toViewCtrl: any,
    operation: any
) => void;

method createAndroidAnimator

createAndroidAnimator: (transitionType: string) => any;

method getCurve

getCurve: () => any;

method getDuration

getDuration: () => number;

method iosDismissedController

iosDismissedController: (dismissed: any) => any;

method iosInteractionDismiss

iosInteractionDismiss: (animator: any) => any;

method iosInteractionPresented

iosInteractionPresented: (animator: any) => any;

method iosNavigatedController

iosNavigatedController: (
    navigationController: any,
    operation: number,
    fromVC: any,
    toVC: any
) => any;

method iosPresentedController

iosPresentedController: (presented: any, presenting: any, source: any) => any;

method setDuration

setDuration: (value: number) => void;

method setupInteractiveGesture

setupInteractiveGesture: (startCallback: () => void, view: View) => void;

class View

abstract class View extends ViewCommon {}

This class is the base class for all UI components. A View occupies a rectangular area on the screen and is responsible for drawing and layouting of all UI components within.

property accessibilityBlurEvent

static accessibilityBlurEvent: string;

String value used when hooking to accessibilityBlur event.

property accessibilityFocusChangedEvent

static accessibilityFocusChangedEvent: string;

String value used when hooking to accessibilityFocusChanged event.

property accessibilityFocusEvent

static accessibilityFocusEvent: string;

String value used when hooking to accessibilityFocus event.

property accessibilityHidden

accessibilityHidden: boolean;

Hide the view and its children from the a11y service

property accessibilityHint

accessibilityHint: string;

A hint describes the elements behavior. Example: 'Tap change playback speed'

property accessibilityIdentifier

accessibilityIdentifier: string;

The view's unique accessibilityIdentifier.
This is used for automated testing.

property accessibilityLabel

accessibilityLabel: string;

Short description of the element, ideally one word.

property accessibilityLanguage

accessibilityLanguage: string;

Sets the language in which to speak the element's label and value. Accepts language ID tags that follows the "BCP 47" specification.

property accessibilityLiveRegion

accessibilityLiveRegion: AccessibilityLiveRegion;

property accessibilityMediaSession

accessibilityMediaSession: boolean;

This view starts a media session. Equivalent to trait = startsMedia

property accessibilityRole

accessibilityRole: AccessibilityRole;

Which role should this view be treated by the a11y service?

property accessibilityState

accessibilityState: AccessibilityState;

Which state should this view be treated as by the a11y service?

property accessibilityValue

accessibilityValue: string;

Current value of the element in a localized string.

property accessible

accessible: boolean;

If true the element is an accessibility element and all the children will be treated as a single selectable component.

property android

android: any;

Gets the android-specific native instance that lies behind this proxy. Will be available if running on an Android platform.

property androidDynamicElevationOffset

androidDynamicElevationOffset: number;

Gets or sets the dynamic elevation offset of the android view.

property androidElevation

androidElevation: number;

Gets or sets the elevation of the android view.

property automationText

automationText: string;

property background

background: string;

Gets or sets the background style property.

property backgroundColor

backgroundColor: string | Color;

Gets or sets the background color of the view.

property backgroundImage

backgroundImage: string | LinearGradient;

Gets or sets the background image of the view.

property bindingContext

bindingContext: any;

Gets or sets the binding context of this instance. This object is used as a source for each Binding that does not have a source object specified.

property borderBottomColor

borderBottomColor: Color;

Gets or sets the bottom border color of the view.

property borderBottomLeftRadius

borderBottomLeftRadius: CoreTypes.LengthType;

Gets or sets the bottom left border radius of the view.

property borderBottomRightRadius

borderBottomRightRadius: CoreTypes.LengthType;

Gets or sets the bottom right border radius of the view.

property borderBottomWidth

borderBottomWidth: CoreTypes.LengthType;

Gets or sets the bottom border width of the view.

property borderColor

borderColor: string | Color;

Gets or sets the border color of the view.

property borderLeftColor

borderLeftColor: Color;

Gets or sets the left border color of the view.

property borderLeftWidth

borderLeftWidth: CoreTypes.LengthType;

Gets or sets the left border width of the view.

property borderRadius

borderRadius: string | number | CoreTypes.LengthDipUnit | CoreTypes.LengthPxUnit;

Gets or sets the border radius of the view.

property borderRightColor

borderRightColor: Color;

Gets or sets the right border color of the view.

property borderRightWidth

borderRightWidth: CoreTypes.LengthType;

Gets or sets the right border width of the view.

property borderTopColor

borderTopColor: Color;

Gets or sets the top border color of the view.

property borderTopLeftRadius

borderTopLeftRadius: CoreTypes.LengthType;

Gets or sets the top left border radius of the view.

property borderTopRightRadius

borderTopRightRadius: CoreTypes.LengthType;

Gets or sets the top right border radius of the view.

property borderTopWidth

borderTopWidth: CoreTypes.LengthType;

Gets or sets the top border width of the view.

property borderWidth

borderWidth: string | number | CoreTypes.LengthDipUnit | CoreTypes.LengthPxUnit;

Gets or sets the border width of the view.

property boxShadow

boxShadow: string | ShadowCSSValues;

Gets or sets the box shadow of the view.

property color

color: Color;

Gets or sets the color of the view.

property css

css: string;

A valid css string which will be applied for all nested UI components (based on css rules).

property cssClasses

cssClasses: Set<string>;

property cssPseudoClasses

cssPseudoClasses: Set<string>;

property cssType

cssType: string;

Gets the CSS fully qualified type name. Using this as element type should allow for PascalCase and kebap-case selectors, when fully qualified, to match the element.

property height

height: CoreTypes.PercentLengthType;

Gets or sets the desired height of the view.

property horizontalAlignment

horizontalAlignment: CoreTypes.HorizontalAlignmentType;

Gets or sets the alignment of this view within its parent along the Horizontal axis.

property ios

ios: any;

Gets the ios-specific native instance that lies behind this proxy. Will be available if running on an iOS platform.

property iosAccessibilityAdjustsFontSize

iosAccessibilityAdjustsFontSize: boolean;

Defines whether accessibility font scale should affect font size.

property iosAccessibilityMaxFontScale

iosAccessibilityMaxFontScale: number;

Gets or sets the maximum accessibility font scale.

property iosAccessibilityMinFontScale

iosAccessibilityMinFontScale: number;

Gets or sets the minimum accessibility font scale.

property iosIgnoreSafeArea

iosIgnoreSafeArea: boolean;

Gets or sets a value indicating whether the the view should totally ignore safe areas computation. This property is iOS specific. Default value: false

property iosOverflowSafeArea

iosOverflowSafeArea: boolean;

Instruct container view to expand beyond the safe area. This property is iOS specific. Default value: false

property iosOverflowSafeAreaEnabled

iosOverflowSafeAreaEnabled: boolean;

Enables or disables the iosOverflowSafeArea property for all children. This property is iOS specific. Default value: true

property isEnabled

isEnabled: boolean;

Gets or sets a value indicating whether the the view is enabled. This affects the appearance of the view.

property isLayoutRequired

isLayoutRequired: boolean;

property isLayoutValid

isLayoutValid: boolean;

Gets is layout is valid. This is a read-only property.

property isUserInteractionEnabled

isUserInteractionEnabled: boolean;

Gets or sets a value indicating whether the user can interact with the view. This does not affect the appearance of the view.

property layoutChangedEvent

static layoutChangedEvent: string;

String value used when hooking to layoutChanged event.

property margin

margin:
    | string
    | number
    | CoreTypes.LengthDipUnit
    | CoreTypes.LengthPxUnit
    | CoreTypes.LengthPercentUnit;

Gets or sets margin style property.

property marginBottom

marginBottom: CoreTypes.PercentLengthType;

Specifies extra space on the bottom side of this view.

property marginLeft

marginLeft: CoreTypes.PercentLengthType;

Specifies extra space on the left side of this view.

property marginRight

marginRight: CoreTypes.PercentLengthType;

Specifies extra space on the right side of this view.

property marginTop

marginTop: CoreTypes.PercentLengthType;

Specifies extra space on the top side of this view.

property minHeight

minHeight: CoreTypes.LengthType;

Gets or sets the minimum height the view may grow to.

property minWidth

minWidth: CoreTypes.LengthType;

Gets or sets the minimum width the view may grow to.

modal: View;

Returns the current modal view that this page is showing (is parent of), if any.

property needsNativeDrawableFill

readonly needsNativeDrawableFill: boolean;

property opacity

opacity: number;

Gets or sets the opacity style property.

property originX

originX: number;

Gets or sets the X component of the origin point around which the view will be transformed. The default value is 0.5 representing the center of the view.

property originY

originY: number;

Gets or sets the Y component of the origin point around which the view will be transformed. The default value is 0.5 representing the center of the view.

property perspective

perspective: number;

Gets or sets the distance of the camera form the view perspective. Usually needed when rotating the view over the X or Y axis.

property rotate

rotate: number;

Gets or sets the rotate affine transform of the view along the Z axis.

property rotateX

rotateX: number;

Gets or sets the rotate affine transform of the view along the X axis.

property rotateY

rotateY: number;

Gets or sets the rotate affine transform of the view along the Y axis.

property scaleX

scaleX: number;

Gets or sets the scaleX affine transform of the view.

property scaleY

scaleY: number;

Gets or sets the scaleY affine transform of the view.

property showingModallyEvent

static showingModallyEvent: string;

String value used when hooking to showingModally event.

property shownModallyEvent

static shownModallyEvent: string;

String value used when hooking to shownModally event.

property translateX

translateX: number;

Gets or sets the translateX affine transform of the view in device independent pixels.

property translateY

translateY: number;

Gets or sets the translateY affine transform of the view in device independent pixels.

property verticalAlignment

verticalAlignment: CoreTypes.VerticalAlignmentType;

Gets or sets the alignment of this view within its parent along the Vertical axis.

property visibility

visibility: CoreTypes.VisibilityType;

Gets or sets the visibility of the view.

property width

width: CoreTypes.PercentLengthType;

Gets or sets the desired width of the view.

method accessibilityAnnouncement

accessibilityAnnouncement: (msg?: string) => void;

Make an announcement to the screen reader.

method accessibilityScreenChanged

accessibilityScreenChanged: () => void;

Announce screen changed

method addCss

addCss: (cssString: string) => void;

Adds a new values to current css.
Parameter cssString
A valid css which will be added to current css.

method addCssFile

addCssFile: (cssFileName: string) => void;

Adds the content of the file to the current css.
Parameter cssFileName
A valid file name (from the application root) which contains a valid css.

method animate

animate: (options: AnimationDefinition) => AnimationPromise;

Animates one or more properties of the view based on the supplied options.

method changeCssFile

changeCssFile: (cssFileName: string) => void;

Changes the current css to the content of the file.
Parameter cssFileName
A valid file name (from the application root) which contains a valid css.

method combineMeasuredStates

static combineMeasuredStates: (curState: number, newState: any) => number;

method createAnimation

createAnimation: (options: AnimationDefinition) => Animation;

Creates an Animation object based on the supplied options.

method eachChildView

eachChildView: (callback: (view: View) => boolean) => void;

Iterates over children of type View.
Parameter callback
Called for each child of type View. Iteration stops if this method returns falsy value.

method focus

focus: () => boolean;

Tries to focus the view. Returns a value indicating whether this view or one of its descendants actually took focus.

method getActualSize

getActualSize: () => Size;

Returns the actual size of the view in device-independent pixels.

method getGestureObservers

getGestureObservers: (type: GestureTypes) => Array<GesturesObserver> | undefined;

method getLocationInWindow

getLocationInWindow: () => Point;

Returns the location of this view in the window coordinate system.

method getLocationOnScreen

getLocationOnScreen: () => Point;

Returns the location of this view in the screen coordinate system.

method getLocationRelativeTo

getLocationRelativeTo: (otherView: View) => Point;

Returns the location of this view in the otherView's coordinate system.

method getMeasuredHeight

getMeasuredHeight: () => number;

Returns the raw height component.

method getMeasuredState

getMeasuredState: () => number;

method getMeasuredWidth

getMeasuredWidth: () => number;

Returns the raw width component.

method getSafeAreaInsets

getSafeAreaInsets: () => { left; top; right; bottom };

Returns the iOS safe area insets of this view.

method hasGestureObservers

hasGestureObservers: () => boolean;

Android only check if gesture observers are attached

method layout

layout: (
    left: number,
    top: number,
    right: number,
    bottom: number,
    setFrame?: boolean
) => void;

Assign a size and position to a view and all of its descendants This is the second phase of the layout mechanism. (The first is measuring). In this phase, each parent calls layout on all of its children to position them. This is typically done using the child measurements that were stored in the measure pass(). Derived classes should not override this method. Derived classes with children should override onLayout. In that method, they should call layout on each of their children.
Parameter l
Left position, relative to parent
Parameter t
Top position, relative to parent
Parameter r
Right position, relative to parent
Parameter b
Bottom position, relative to parent

method layoutChild

static layoutChild: (
    parent: View,
    child: View,
    left: number,
    top: number,
    right: number,
    bottom: number
) => void;

Layout a child by taking into account its margins, horizontal and vertical alignments and a given bounds.
Parameter parent
This parameter is not used. You can pass null.
Parameter left
Left position, relative to parent
Parameter top
Top position, relative to parent
Parameter right
Right position, relative to parent
Parameter bottom
Bottom position, relative to parent

method layoutNativeView

layoutNativeView: (
    left: number,
    top: number,
    right: number,
    bottom: number
) => void;

Called from onLayout when native view position is about to be changed.
Parameter left
Left position, relative to parent
Parameter top
Top position, relative to parent
Parameter right
Right position, relative to parent
Parameter bottom
Bottom position, relative to parent

method measure

measure: (widthMeasureSpec: number, heightMeasureSpec: number) => void;

This is called to find out how big a view should be. The parent supplies constraint information in the width and height parameters. The actual measurement work of a view is performed in onMeasure(int, int), called by this method. Therefore, only onMeasure(int, int) can and must be overridden by subclasses.
Parameter widthMeasureSpec
Horizontal space requirements as imposed by the parent
Parameter heightMeasureSpec
Vertical space requirements as imposed by the parent

method measureChild

static measureChild: (
    parent: View,
    child: View,
    widthMeasureSpec: number,
    heightMeasureSpec: number
) => { measuredWidth: number; measuredHeight: number };

Measure a child by taking into account its margins and a given measureSpecs.
Parameter parent
This parameter is not used. You can pass null.
Parameter child
The view to be measured.
Parameter measuredWidth
The measured width that the parent layout specifies for this view.
Parameter measuredHeight
The measured height that the parent layout specifies for this view.

method off

off: (
    eventName: string,
    callback?: (args: EventData) => void,
    thisArg?: any
) => any;

Removes the listener(s) for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
An optional specific event listener to remove (if omitted, all event listeners by this name will be removed).
Parameter thisArg
An optional parameter which, when set, will be used to refine search of the correct event listener to be removed.

method on

on: {
    (eventName: string, callback: (args: EventData) => void, thisArg?: any): any;
    (event: 'loaded', callback: (args: EventData) => void, thisArg?: any): any;
    (event: 'unloaded', callback: (args: EventData) => void, thisArg?: any): any;
    (
        event: 'androidBackPressed',
        callback: (args: EventData) => void,
        thisArg?: any
    ): any;
    (
        event: 'showingModally',
        callback: (args: ShownModallyData) => void,
        thisArg?: any
    ): void;
    (
        event: 'shownModally',
        callback: (args: ShownModallyData) => void,
        thisArg?: any
    ): any;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when a loaded event occurs.
Raised when an unloaded event occurs.
Raised when a back button is pressed. This event is raised only for android.
Raised before the view is shown as a modal dialog.
Raised after the view is shown as a modal dialog.

method onBackPressed

onBackPressed: () => boolean;

Derived classes can override this method to handle Android back button press.

method onLayout

onLayout: (left: number, top: number, right: number, bottom: number) => void;

Called from layout when this view should assign a size and position to each of its children. Derived classes with children should override this method and call layout on each of their children.
Parameter left
Left position, relative to parent
Parameter top
Top position, relative to parent
Parameter right
Right position, relative to parent
Parameter bottom
Bottom position, relative to parent

method onMeasure

onMeasure: (widthMeasureSpec: number, heightMeasureSpec: number) => void;

Measure the view and its content to determine the measured width and the measured height. This method is invoked by measure(int, int) and should be overriden by subclasses to provide accurate and efficient measurement of their contents. When overriding this method, you must call setMeasuredDimension(int, int) to store the measured width and height of this view. Failure to do so will trigger an exception, thrown by measure(int, int).
Parameter widthMeasureSpec
horizontal space requirements as imposed by the parent. The requirements are encoded with View.MeasureSpec.
Parameter heightMeasureSpec
vertical space requirements as imposed by the parent. The requirements are encoded with View.MeasureSpec.

method resolveSizeAndState

static resolveSizeAndState: (
    size: number,
    specSize: number,
    specMode: number,
    childMeasuredState: number
) => number;

Utility to reconcile a desired size and state, with constraints imposed by a MeasureSpec. Will take the desired size, unless a different size is imposed by the constraints. The returned value is a compound integer, with the resolved size in the MEASURED_SIZE_MASK bits and optionally the bit MEASURED_STATE_TOO_SMALL set if the resulting size is smaller than the size the view wants to be.

method sendAccessibilityEvent

sendAccessibilityEvent: (options: Partial<AccessibilityEventOptions>) => void;

Send accessibility event options AccessibilityEventOptions androidAccessibilityEvent: AndroidAccessibilityEvent; iosNotificationType: IOSPostAccessibilityNotificationType; message: string;
iOS Notes: type = 'announcement' will announce args via VoiceOver. If no args element will be announced instead. type = 'layout' used when the layout of a screen changes. type = 'screen' large change made to the screen.

method setMeasuredDimension

setMeasuredDimension: (measuredWidth: number, measuredHeight: number) => void;

This method must be called by onMeasure(int, int) to store the measured width and measured height. Failing to do so will trigger an exception at measurement time.
Parameter measuredWidth
The measured width of this view. May be a complex bit mask as defined by MEASURED_SIZE_MASK and MEASURED_STATE_TOO_SMALL.
Parameter measuredHeight
The measured height of this view. May be a complex bit mask as defined by MEASURED_SIZE_MASK and MEASURED_STATE_TOO_SMALL.

method setOnTouchListener

setOnTouchListener: () => void;

Android only to set the touch listener

class ViewBase

abstract class ViewBase extends Observable implements ViewBaseDefinition {}

constructor

constructor();

property ['class']

['class']: string;

property alignSelf

alignSelf: AlignSelf;

property android

readonly android: any;

property bindingContext

bindingContext: any;

property className

className: string;

Gets or sets the CSS class name for this view.

property col

col: number;

property colSpan

colSpan: number;

property column

column: number;

property columnSpan

columnSpan: number;

property createdEvent

static createdEvent: string;

String value used when hooking to creation event

property cssClasses

cssClasses: Set<string>;

property cssPseudoClasses

cssPseudoClasses: Set<string>;

property defaultVisualState

defaultVisualState: string;

Default visual state, defaults to 'normal'

property disposeNativeViewEvent

static disposeNativeViewEvent: string;

String value used when hooking to disposeNativeView event

property dock

dock: 'left' | 'right' | 'top' | 'bottom';

property domNode

domNode: dnm.DOMNode;

property effectiveBorderBottomWidth

effectiveBorderBottomWidth: number;

property effectiveBorderLeftWidth

effectiveBorderLeftWidth: number;

property effectiveBorderRightWidth

effectiveBorderRightWidth: number;

property effectiveBorderTopWidth

effectiveBorderTopWidth: number;

property effectiveHeight

effectiveHeight: number;

property effectiveLeft

effectiveLeft: number;

property effectiveMarginBottom

effectiveMarginBottom: number;

property effectiveMarginLeft

effectiveMarginLeft: number;

property effectiveMarginRight

effectiveMarginRight: number;

property effectiveMarginTop

effectiveMarginTop: number;

property effectiveMinHeight

effectiveMinHeight: number;

property effectiveMinWidth

effectiveMinWidth: number;

property effectivePaddingBottom

effectivePaddingBottom: number;

property effectivePaddingLeft

effectivePaddingLeft: number;

property effectivePaddingRight

effectivePaddingRight: number;

property effectivePaddingTop

effectivePaddingTop: number;

property effectiveTop

effectiveTop: number;

property effectiveWidth

effectiveWidth: number;

property flexGrow

flexGrow: number;

property flexShrink

flexShrink: number;

property flexWrapBefore

flexWrapBefore: boolean;

property id

id: string;

Gets or sets the id for this view.

property ios

readonly ios: any;

property isCollapsed

isCollapsed: any;

Returns true if visibility is set to 'collapse'. Default(false) set in prototype Readonly property

property isLoaded

readonly isLoaded: boolean;

property left

left: CoreTypes.LengthType;

property loadedEvent

static loadedEvent: string;

String value used when hooking to loaded event.

property mIsRootView

mIsRootView: boolean;

if _setupAsRootView is called it means it is not supposed to be added to a parent. However parent can be set before for the purpose of CSS variables/classes. That variable ensures that _addViewToNativeVisualTree is not called in _setupAsRootView

property nativeView

nativeView: any;

property nativeViewProtected

nativeViewProtected: any;

read-only. If you want to set out-of-band the nativeView use the setNativeView method.

property order

order: number;

property page

readonly page: Page;

Gets owner page. This is a read-only property.

property parent

parent: ViewBaseDefinition;

Gets the parent view. This property is read-only.

property parentNode

parentNode: ViewBaseDefinition;

Gets the template parent or the native parent. Sets the template parent.

property recycleNativeView

recycleNativeView: 'auto' | 'always' | 'never';

property reusable

reusable: boolean;

Gets or sets if the view is reusable. Reusable views are not automatically destroyed when removed from the View tree.

property row

row: number;

property rowSpan

rowSpan: number;

property sharedTransitionIgnore

sharedTransitionIgnore: boolean;

Opt out of shared transition under different binding conditions

property sharedTransitionTag

sharedTransitionTag: string;

Gets or sets the shared transition tag for animated view transitions

property style

style: Style;

Gets the style object associated to this view.

property top

top: CoreTypes.LengthType;

property typeName

readonly typeName: string;

Gets the name of the constructor function for this instance. E.g. for a Button class this will return "Button".

property unloadedEvent

static unloadedEvent: string;

String value used when hooking to unloaded event.

property viewController

viewController: any;

returns the native UIViewController.

property visualState

readonly visualState: string;

method addPseudoClass

addPseudoClass: (name: string) => void;

A widget can call this method to add a matching css pseudo class.

method bind

bind: (options: BindingOptions, source?: Object) => void;

method callLoaded

callLoaded: () => void;

method callUnloaded

callUnloaded: () => void;

method closeModal

closeModal: (...args: any[]) => void;

Closes the current modal view that this page is showing.
Parameter context
Any context you want to pass back to the host when closing the modal view.

method createNativeView

createNativeView: () => Object;

Creates a native view. Returns either android.view.View or UIView.

method deletePseudoClass

deletePseudoClass: (name: string) => void;

A widget can call this method to discard matching css pseudo class.

method destroyNode

destroyNode: (forceDestroyChildren?: boolean) => void;

Tears down the UI of a reusable node by making it no longer reusable.
Parameter forceDestroyChildren
Force destroy the children (even if they are reusable)
See Also
- _tearDownUI

method disposeNativeView

disposeNativeView: () => void;

Clean up references to the native view.

method eachChild

eachChild: (callback: (child: ViewBase) => boolean) => void;

Iterates over children of type ViewBase.
Parameter callback
Called for each child of type ViewBase. Iteration stops if this method returns falsy value.

method ensureDomNode

ensureDomNode: () => void;

Ensures a dom-node for this view.

method getViewByDomId

getViewByDomId: <T extends ViewBaseDefinition>(domId: number) => T;

Returns the child view with the specified domId.

method getViewById

getViewById: <T extends ViewBaseDefinition>(id: string) => T;

Returns the child view with the specified id.

method initNativeView

initNativeView: () => void;

Initializes properties/listeners of the native view.

method loadView

loadView: (view: ViewBase) => void;

Load view.
Parameter view
to load.

method onLoaded

onLoaded: () => void;

method onResumeNativeUpdates

onResumeNativeUpdates: () => void;

method onUnloaded

onUnloaded: () => void;

method requestLayout

requestLayout: () => void;

Invalidates the layout of the view and triggers a new layout pass.

method resetNativeView

resetNativeView: () => void;

Resets properties/listeners set to the native view.

method set

set: (name: string, value: any) => void;

method setInlineStyle

setInlineStyle: (style: string) => void;

method setNativeView

setNativeView: (value: any) => void;

Set the nativeView field performing extra checks and updates to the native properties on the new view. Use in cases where the createNativeView is not suitable. As an example use in item controls where the native parent view will create the native views for child items.

method showModal

showModal: {
    (view: ViewBase, modalOptions?: ShowModalOptions): ViewBase;
    (moduleName: string, modalOptions?: ShowModalOptions): ViewBaseDefinition;
};

Shows the view passed as parameter as a modal view.
Parameter view
View instance to be shown modally.
Parameter modalOptions
A ShowModalOptions instance
Shows the View contained in moduleName as a modal view.
Parameter moduleName
The name of the module to load starting from the application root.
Parameter modalOptions
A ShowModalOptions instance

method toString

toString: () => string;

method unbind

unbind: (property: string) => void;

method unloadView

unloadView: (view: ViewBase) => void;

Unload view.
Parameter view
to unload.

class ViewHelper

class ViewHelper {}

method combineMeasuredStates

static combineMeasuredStates: (curState: number, newState: any) => number;

method layoutChild

static layoutChild: (
    parent: View,
    child: View,
    left: number,
    top: number,
    right: number,
    bottom: number
) => void;

Layout a child by taking into account its margins, horizontal and vertical alignments and a given bounds.
Parameter parent
This parameter is not used. You can pass null.
Parameter left
Left position, relative to parent
Parameter top
Top position, relative to parent
Parameter right
Right position, relative to parent
Parameter bottom
Bottom position, relative to parent

method measureChild

static measureChild: (
    parent: View,
    child: View,
    widthMeasureSpec: number,
    heightMeasureSpec: number
) => { measuredWidth: number; measuredHeight: number };

Measure a child by taking into account its margins and a given measureSpecs.
Parameter parent
This parameter is not used. You can pass null.
Parameter child
The view to be measured.
Parameter measuredWidth
The measured width that the parent layout specifies for this view.
Parameter measuredHeight
The measured height that the parent layout specifies for this view.

method resolveSizeAndState

static resolveSizeAndState: (
    size: number,
    specSize: number,
    specMode: number,
    childMeasuredState: number
) => number;

Utility to reconcile a desired size and state, with constraints imposed by a MeasureSpec. Will take the desired size, unless a different size is imposed by the constraints. The returned value is a compound integer, with the resolved size in the MEASURED_SIZE_MASK bits and optionally the bit MEASURED_STATE_TOO_SMALL set if the resulting size is smaller than the size the view wants to be.

class VirtualArray

class VirtualArray<T> extends Observable {}

Advanced array like class that helps loading items on demand.

constructor

constructor(length?: number);

property changeEvent

static changeEvent: string;

String value used when hooking to change event.

property itemsLoadingEvent

static itemsLoadingEvent: string;

String value used when hooking to itemsLoading event.

property length

length: number;

Gets or sets length for the virtual array.

property loadSize

loadSize: number;

method getItem

getItem: (index: number) => T;

method load

load: (index: number, items: T[]) => void;

Loads items from an array starting at index.

method setItem

setItem: (index: number, value: T) => void;

class WebView

class WebView extends View {}

Represents a standard WebView widget.

property android

android: any;

Gets the native [android widget](http://developer.android.com/reference/android/webkit/WebView.html) that represents the user interface for this component. Valid only when running on Android OS.

property canGoBack

canGoBack: boolean;

Gets a value indicating whether the WebView can navigate back.

property canGoForward

canGoForward: boolean;

Gets a value indicating whether the WebView can navigate forward.

property disableZoom

disableZoom: boolean;

Disable scrolling in the WebView

property ios

ios: any;

Gets the native [WKWebView](https://developer.apple.com/documentation/webkit/wkwebview/) that represents the user interface for this component. Valid only when running on iOS.

property iosAllowInlineMediaPlayback

iosAllowInlineMediaPlayback: boolean;

Enables inline media playback on iOS. By default, webview forces iPhone into fullscreen media playback.

property loadFinishedEvent

static loadFinishedEvent: string;

String value used when hooking to loadFinished event.

property loadStartedEvent

static loadStartedEvent: string;

String value used when hooking to loadStarted event.

property src

src: string;

Gets or sets the url, local file path or HTML string.

method goBack

goBack: () => any;

Navigates back.

method goForward

goForward: () => any;

Navigates forward.

method on

on: {
    (
        eventName: string,
        callback: (data: EventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'loadFinished',
        callback: (args: LoadEventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'loadStarted',
        callback: (args: LoadEventData) => void,
        thisArg?: any
    ): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when a loadFinished event occurs.
Raised when a loadStarted event occurs.

method reload

reload: () => any;

Reloads the current url.

method stopLoading

stopLoading: () => void;

Stops loading the current content (if any).

class WrapLayout

class WrapLayout extends LayoutBase {}

WrapLayout position children in rows or columns depending on orientation property until space is filled and then wraps them on new row or column.

property itemHeight

itemHeight: CoreTypes.LengthType;

Gets or sets the height used to measure and layout each child. Default value is Number.NaN which does not restrict children.

property itemWidth

itemWidth: CoreTypes.LengthType;

Gets or sets the width used to measure and layout each child. Default value is Number.NaN which does not restrict children.

property orientation

orientation: CoreTypes.OrientationType;

Gets or sets the flow direction. Default value is horizontal. If orientation is horizontal items are arranged in rows, else items are arranged in columns.

class WrappedValue

class WrappedValue {}

Helper class that is used to fire property change even when real object is the same. By default property change will not be fired for a same object. By wrapping object into a WrappedValue instance same object restriction will be passed.

constructor

constructor(wrapped: any);

Creates an instance of WrappedValue object.
Parameter wrapped
the real value which should be wrapped.

property wrapped

wrapped: any;

Property which holds the real value.

method unwrap

static unwrap: (value: any) => any;

Gets the real value of previously wrappedValue.
Parameter value
Value that should be unwraped. If there is no wrappedValue property of the value object then value will be returned.

method wrap

static wrap: (value: any) => any;

Returns an instance of WrappedValue. The actual instance is get from a WrappedValues pool.
Parameter value
Value that should be wrapped.

class XmlParser

class XmlParser {}

A simple non-validating SAX parser based on https://github.com/vflash/easysax version 0.1.14

constructor

constructor(
    onEvent: (event: ParserEvent) => void,
    onError?: (error: Error, position: Position) => void,
    processNamespaces?: boolean,
    angularSyntax?: boolean
);

Creates a new instance of the XmlParser class.
Parameter onEvent
The callback to execute when a parser event occurs. The 'event' parameter contains information about the event.
Parameter onError
The callback to execute when a parser error occurs. The 'error' parameter contains the error.
Parameter processNamespaces
Specifies whether namespaces should be processed.

method parse

parse: (xmlString: string) => void;

Parses the supplied xml string.
Parameter xmlString
The string containing the xml to parse.

Interfaces

interface ActionOptions

interface ActionOptions extends CancelableOptions {}

Provides options for the dialog.

property actions

actions?: Array<string>;

Gets or sets the list of available actions.

property cancelButtonText

cancelButtonText?: string;

Gets or sets the Cancel button text.

property destructiveActionsIndexes

destructiveActionsIndexes?: Array<number>;

[iOS only] Gets or sets the indexes of destructive actions.

property message

message?: string;

Gets or sets the dialog message.

property title

title?: string;

Gets or sets the dialog title.

interface AddArrayFromBuilder

interface AddArrayFromBuilder {}

Defines an interface for adding arrays declared in xml.

interface AddChildFromBuilder

interface AddChildFromBuilder {}

Defines an interface for adding a child element declared in xml.

interface AlertOptions

interface AlertOptions extends DialogOptions {}

Provides options for the alert.

property okButtonText

okButtonText?: string;

Gets or sets the OK button text.

interface AndroidActivityBackPressedEventData

interface AndroidActivityBackPressedEventData extends AndroidActivityEventData {}

Data for the Android activity back pressed event.

property cancel

cancel: boolean;

In the event handler, set this value to true if you want to cancel the back navigation and do something else instead.

interface AndroidActivityBundleEventData

interface AndroidActivityBundleEventData extends AndroidActivityEventData {}

Data for the Android activity events with bundle.

property bundle

bundle: android.os.Bundle;

The bundle.

interface AndroidActivityCallbacks

interface AndroidActivityCallbacks {}

method getRootView

getRootView: () => View;

method onActivityResult

onActivityResult: (
    activity: any,
    requestCode: number,
    resultCode: number,
    data: any,
    superFunc: Function
) => any;

method onBackPressed

onBackPressed: (activity: any, superFunc: Function) => void;

method onCreate

onCreate: (
    activity: any,
    savedInstanceState: any,
    intent: any,
    superFunc: Function
) => void;

method onDestroy

onDestroy: (activity: any, superFunc: Function) => void;

method onNewIntent

onNewIntent: (
    activity: any,
    intent: any,
    superSetIntentFunc: Function,
    superFunc: Function
) => void;

method onPostResume

onPostResume: (activity: any, superFunc: Function) => void;

method onRequestPermissionsResult

onRequestPermissionsResult: (
    activity: any,
    requestCode: number,
    permissions: Array<string>,
    grantResults: Array<number>,
    superFunc: Function
) => void;

method onSaveInstanceState

onSaveInstanceState: (activity: any, outState: any, superFunc: Function) => void;

method onStart

onStart: (activity: any, superFunc: Function) => void;

method onStop

onStop: (activity: any, superFunc: Function) => void;

method resetActivityContent

resetActivityContent: (activity: any) => void;

interface AndroidActivityEventData

interface AndroidActivityEventData {}

Data for the Android activity events.

property activity

activity: androidx.appcompat.app.AppCompatActivity;

The activity.

property eventName

eventName: string;

The name of the event.

property object

object: any;

The instance that has raised the event.

interface AndroidActivityNewIntentEventData

interface AndroidActivityNewIntentEventData extends AndroidActivityEventData {}

Data for the Android activity newIntent event.

property intent

intent: any;

The intent.

interface AndroidActivityRequestPermissionsEventData

interface AndroidActivityRequestPermissionsEventData
    extends AndroidActivityEventData {}

Data for the Android activity onRequestPermissions callback

property grantResults

grantResults: Array<number>;

The Granted.

property permissions

permissions: Array<string>;

The Permissions.

property requestCode

requestCode: number;

The request code.

interface AndroidActivityResultEventData

interface AndroidActivityResultEventData extends AndroidActivityEventData {}

Data for the Android activity result event.

property intent

intent: android.content.Intent;

The intent.

property requestCode

requestCode: number;

The request code.

property resultCode

resultCode: number;

The result code.

interface AnimationDefinition

interface AnimationDefinition {}

Defines animation options for the View.animate method.

property backgroundColor

backgroundColor?: Color;

Animates the backgroundColor of the view.

property curve

curve?: any;

An optional animation curve. Possible values are contained in the [AnimationCurve enumeration](../modules/_ui_enums_.animationcurve.html). Alternatively, you can pass an instance of type UIViewAnimationCurve for iOS or android.animation.TimeInterpolator for Android.

property delay

delay?: number;

The amount of time, in milliseconds, to delay starting the animation.

property duration

duration?: number;

The length of the animation in milliseconds. The default duration is 300 milliseconds.

property height

height?: CoreTypes.PercentLengthType | string;

Animates the height of a view.

property iterations

iterations?: number;

Specifies how many times the animation should be played. Default is 1. iOS animations support fractional iterations, i.e. 1.5. To repeat an animation infinitely, use Number.POSITIVE_INFINITY

property opacity

opacity?: number;

Animates the opacity of the view. Value should be a number between 0.0 and 1.0

property rotate

rotate?: number | Point3D;

Animates the rotate affine transform of the view. Value should be a number specifying the rotation amount in degrees.

property scale

scale?: Pair;

Animates the scale affine transform of the view.

property target

target?: View;

The view whose property is to be animated.

property translate

translate?: Pair;

Animates the translate affine transform of the view.

property width

width?: CoreTypes.PercentLengthType | string;

Animates the width of a view.

interface ApplicationEventData

interface ApplicationEventData {}

Event data containing information for the application events.

property android

android?: any;

Gets the native Android event arguments. Valid only when running on Android.

property eventName

eventName: string;

The name of the event.

property ios

ios?: any;

Gets the native iOS event arguments. Valid only when running on iOS.

property object

object: ApplicationCommon | Observable;

The instance that has raised the event.

interface BackstackEntry

interface BackstackEntry {}

Represents an entry in the back stack of a Frame object.

property entry

entry: NavigationEntry;

property fragment

fragment?: any;

property fragmentTag

fragmentTag: string;

property frameId

frameId?: number;

property navDepth

navDepth: number;

property recreated

recreated?: boolean;

property resolvedPage

resolvedPage: Page;

property viewSavedState

viewSavedState?: any;

interface BindingOptions

interface BindingOptions {}

The options object used in the Bindable.bind method.

property expression

expression?: string;

An expression used for calculations (convertions) based on the value of the property.

property sourceProperty

sourceProperty: string;

The property name of the source object (typically the ViewModel) to bind to.

property targetProperty

targetProperty: string;

The property name of the target object (that is the Bindable instance) to bind the source property to.

property twoWay

twoWay?: boolean;

True to establish a two-way binding, false otherwise. A two-way binding will synchronize both the source and the target property values regardless of which one initiated the change.

interface CancelableOptions

interface CancelableOptions {}

Provides options for the dialog.

property cancelable

cancelable?: boolean;

[Android only] Gets or sets if the dialog can be canceled by taping outside of the dialog.

property theme

theme?: number;

[Android only] Sets the theme of the Dialog. Usable themes can be found: https://developer.android.com/reference/android/R.style

interface ChangedData

interface ChangedData<T> extends EventData {}

Event args for "changed" event.

property action

action: string;

Change type.

property addedCount

addedCount: number;

Number of added items.

property index

index: number;

Start index.

property removed

removed: Array<T>;

Removed items.

interface CommonLayoutParams

interface CommonLayoutParams {}

property bottomMargin

bottomMargin: number;

property bottomMarginPercent

bottomMarginPercent: number;

property height

height: number;

property heightPercent

heightPercent: number;

property horizontalAlignment

horizontalAlignment: CoreTypes.HorizontalAlignmentType;

property leftMargin

leftMargin: number;

property leftMarginPercent

leftMarginPercent: number;

property rightMargin

rightMargin: number;

property rightMarginPercent

rightMarginPercent: number;

property topMargin

topMargin: number;

property topMarginPercent

topMarginPercent: number;

property verticalAlignment

verticalAlignment: CoreTypes.VerticalAlignmentType;

property width

width: number;

property widthPercent

widthPercent: number;

interface ComponentModule

interface ComponentModule {}

property component

component: View;

property exports

exports: any;

interface ConfirmOptions

interface ConfirmOptions extends AlertOptions {}

Provides options for the confirm dialog.

property cancelButtonText

cancelButtonText?: string;

Gets or sets the Cancel button text.

property neutralButtonText

neutralButtonText?: string;

Gets or sets the neutral button text.

interface CreateViewEventData

interface CreateViewEventData extends EventData {}

Event data containing information for creating a native view that will be added to the visual tree.

property context

context?: any;

An optional context for creating the view.

property view

view: any;

The native view that should be added to the visual tree.

interface CssChangedEventData

interface CssChangedEventData extends ApplicationEventData {}

Event data containing information about application css change.

property cssFile

cssFile?: string;

property cssText

cssText?: string;

interface DialogOptions

interface DialogOptions extends CancelableOptions {}

Provides options for the dialog.

property message

message?: string;

Gets or sets the dialog message.

property title

title?: string;

Gets or sets the dialog title.

interface DiscardedErrorEventData

interface DiscardedErrorEventData extends ApplicationEventData {}

Event data containing information about discarded application errors.

property error

error: NativeScriptError;

interface DownloadedData

interface DownloadedData extends EventData {}

Provides data for downloaded event.

property image

image: ImageSource;

Gets the cached image.

property key

key: string;

A string indentifier of the cached image.

interface DownloadError

interface DownloadError extends EventData {}

Provides data for download error.

property error

error: Error;

Gets the error.

property key

key: string;

A string indentifier of the cached image.

interface DownloadRequest

interface DownloadRequest {}

Represents a single download request.

property completed

completed?: (image: any, key: string) => void;

An optional function to be called when the download is complete.

property error

error?: (key: string) => void;

An optional function to be called if the download errors.

property key

key: string;

The key used to cache the image.

property url

url: string;

The url of the image.

interface EventData

interface EventData {}

Base event data.

property eventName

eventName: string;

The name of the event.

property object

object: Observable;

The Observable instance that has raised the event.

interface FontScaleChangedEventData

interface FontScaleChangedEventData extends ApplicationEventData {}

Event data containing information for font scale changed event.

property newValue

newValue: number;

New font scale value.

interface GestureEventData

interface GestureEventData extends EventData {}

Provides gesture event data.

property android

android: any;

Gets the underlying native android specific [gesture detector](http://developer.android.com/reference/android/view/GestureDetector.html).

property ios

ios: any;

Gets the underlying native iOS specific [UIGestureRecognizer](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIGestureRecognizer_Class/).

property type

type: GestureTypes;

Gets the type of the gesture.

property view

view: View;

Gets the view which originates the gesture.

interface GestureEventDataWithState

interface GestureEventDataWithState extends GestureEventData {}

Provides gesture event data.

property state

state: number;

interface HttpContent

interface HttpContent {}

Encapsulates the content of an HttpResponse.

property raw

raw: any;

Gets the response body as raw data.

property toArrayBuffer

toArrayBuffer: () => ArrayBuffer;

Gets the response body as ArrayBuffer

property toFile

toFile: (destinationFilePath?: string) => File;

Gets the response body as file.

property toImage

toImage: () => Promise<ImageSource>;

Gets the response body as ImageSource.

property toJSON

toJSON: (encoding?: HttpResponseEncoding) => any;

Gets the response body as JSON object.

property toString

toString: (encoding?: HttpResponseEncoding) => string;

Gets the response body as string.

interface HttpRequestOptions

interface HttpRequestOptions {}

Provides options for the http requests.

property content

content?: string | FormData | ArrayBuffer;

Gets or sets the request body.

property dontFollowRedirects

dontFollowRedirects?: boolean;

Gets or sets wether to *not* follow server's redirection responses.

property headers

headers?: any;

Gets or sets the request headers in JSON format.

property method

method: string;

Gets or sets the request method.

property timeout

timeout?: number;

Gets or sets the request timeout in milliseconds.

property url

url: string;

Gets or sets the request url.

interface HttpResponse

interface HttpResponse {}

Encapsulates HTTP-response information from an HTTP-request.

property content

content?: HttpContent;

Gets the response content.

property headers

headers: Headers;

Gets the response headers.

property statusCode

statusCode: number;

Gets the response status code.

interface IDevice

interface IDevice {}

property deviceType

deviceType: 'Phone' | 'Tablet';

Gets the type of the current device. Available values: "Phone", "Tablet".

property language

language: string;

Gets the preferred language. For example "en" or "en-US".

property manufacturer

manufacturer: string;

Gets the manufacturer of the device. For example: "Apple" or "HTC" or "Samsung".

property model

model: string;

Gets the model of the device. For example: "Nexus 5" or "iPhone".

property os

os: string;

Gets the OS of the device. For example: "Android" or "iOS".

property osVersion

osVersion: string;

Gets the OS version. For example: 4.4.4(android), 8.1(ios)

property region

region: string;

Gets the preferred region. For example "US".

property sdkVersion

sdkVersion: string;

Gets the SDK version. For example: 19(android), 8.1(ios).

property uuid

uuid: string;

Gets the uuid. On iOS this will return a new uuid if the application is re-installed on the device. If you need to receive the same uuid even after the application has been re-installed on the device, use this plugin: https://www.npmjs.com/package/nativescript-ios-uuid

interface ImageAssetOptions

interface ImageAssetOptions {}

property autoScaleFactor

autoScaleFactor?: boolean;

property height

height?: number;

property keepAspectRatio

keepAspectRatio?: boolean;

property width

width?: number;

interface InitRootViewEventData

interface InitRootViewEventData extends ApplicationEventData {}

Event data containing information about root view application.

property rootView

rootView: View;

interface ItemEventData

interface ItemEventData extends EventData {}

Event data containing information for the index and the view associated to a list view item.

property android

android: any /* android.view.ViewGroup */;

Gets the native [android widget](http://developer.android.com/reference/android/view/ViewGroup.html) that represents the user interface where the view is hosted. Valid only when running on Android OS.

property index

index: number;

The index of the item, for which the event is raised.

property ios

ios: any /* UITableViewCell */;

Gets the native [iOS view](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITableViewCell_Class/) that represents the user interface where the view is hosted. Valid only when running on iOS.

property view

view: View;

The view that is associated to the item, for which the event is raised.

interface ItemsLoading

interface ItemsLoading extends EventData {}

Event args for "itemsLoading" event.

property count

count: number;

Number of items to load.

property index

index: number;

Start index.

interface ItemsSource

interface ItemsSource {}

property length

length: number;

method getItem

getItem: (index: number) => any;

interface KeyedTemplate

interface KeyedTemplate {}

Defines an interface for Template with a key.

property createView

createView: Template;

The function that creates the view.

property key

key: string;

The unique key of the template.

interface KeyframeDeclaration

interface KeyframeDeclaration {}

property property

property: string;

property value

value: any;

interface KeyframeInfo

interface KeyframeInfo {}

property curve

curve?: any;

property declarations

declarations: Array<KeyframeDeclaration>;

property duration

duration: number;

interface LaunchEventData

interface LaunchEventData extends EventData {}

Event data containing information for launch event.

property android

android?: android.content.Intent;

property ios

ios?: any;

property root

root?: View | null;

The root view for this Window on iOS or Activity for Android. If not set a new Frame will be created as a root view in order to maintain backwards compatibility. If explicitly set to null, there will be no root view.

property savedInstanceState

savedInstanceState?: any;

interface LoadAppCSSEventData

interface LoadAppCSSEventData extends ApplicationEventData {}

property cssFile

cssFile: string;

interface LoadEventData

interface LoadEventData extends EventData {}

Event data containing information for the loading events of a WebView.

property error

error: string;

Gets the error (if any).

property navigationType

navigationType: NavigationType;

Gets the navigation type of the web-view.

property url

url: string;

Gets the url of the web-view.

interface LoadOptions

interface LoadOptions {}

property attributes

attributes?: any;

property exports

exports?: any;

property name

name: string;

property page

page?: Page;

property path

path: string;

interface LoginOptions

interface LoginOptions extends ConfirmOptions {}

Provides options for the login dialog.

property password

password?: string;

Gets or sets the default text to display in the password input box.

property passwordHint

passwordHint?: string;

Gets or sets the default text to display as hint in the password input box.

property userName

userName?: string;

Gets or sets the default text to display in the user name input box.

property userNameHint

userNameHint?: string;

Gets or sets the default text to display as hint in the user name input box.

interface LoginResult

interface LoginResult {}

Provides result data from the login dialog.

property password

password: string;

Gets or sets the password entered in the login dialog.

property result

result: boolean;

Gets or sets the login dialog boolean result.

property userName

userName: string;

Gets or sets the user entered in the login dialog.

interface NativeScriptConfig

interface NativeScriptConfig {}

property android

android?: IConfigAndroid;

Android specific configurations Various Android specific configurations including Android runtime flags.

property appPath

appPath?: string;

Path to the app source directory This is often the src or app directory however can be changed.

property appResourcesPath

appResourcesPath?: string;

App_Resources path This is often at the root or inside src or app directory however can be anywhere.

property cli

cli?: IConfigCLI;

Set cli options

property cssParser

cssParser?: 'rework' | 'nativescript' | 'css-tree';

Set the default CSS parser that NativeScript will use. Default: css-tree

property embed

embed?: IConfigEmbed;

For embedding into existing platform host projects.

property hooks

hooks?: IConfigHook[];

Set project persistent hooks to run

property id

id?: string;

App's bundle id Used for both iOS and Android if they use the same bundle id. You can override per platform in the respective platform specific configurations.

property ignoredNativeDependencies

ignoredNativeDependencies?: string[];

Optionally specify a list of npm package names for which you would like the NativeScript CLI to ignore when attaching native dependencies to the build

property ios

ios?: IConfigIOS;

iOS specific configurations Various iOS specific configurations including iOS runtime flags.

property main

main?: string;

App's main entry file - this setting overrides the value set in package.json

property overridePods

overridePods?: string;

property previewAppSchema

previewAppSchema?: string;

property profiling

profiling?: InstrumentationMode;

Enable profiling for the application. Default: no profiling In most cases when profiling, you will want to use "timeline"

property projectName

projectName?: string;

Custom platform project name. By default, the platforms/{platform}/{name} is based on the basename of the project directory. You can override that to use a name of your choice by setting this.

property shared

shared?: boolean;

property visionos

visionos?: IConfigVisionOS;

Vision Pro specific configurations Various VisionOS specific configurations including iOS runtime flags.

property webpackConfigPath

webpackConfigPath?: string;

Custom webpack config path The default is webpack.config.js in the root however you can use a custom name and place elsewhere.

interface NativeScriptError

interface NativeScriptError extends Error {}

An extended JavaScript Error which will have the nativeError property initialized in case the error is caused by executing platform-specific code.

property nativeException

nativeException?: any;

Represents the native error object.

property stack

stack?: string;

Javascript portion of stack trace.

property stackTrace

stackTrace?: string;

The native stack trace.

interface NavigatedData

interface NavigatedData extends EventData {}

Defines the data for the page navigation events.

property context

context: any;

The navigation context (optional, may be undefined) passed to the page navigation events method.

property isBackNavigation

isBackNavigation: boolean;

Represents if a navigation is forward or backward.

interface NavigationContext

interface NavigationContext {}

Represents a context passed to navigation methods.

property entry

entry: BackstackEntry;

property isBackNavigation

isBackNavigation: boolean;

property navigationType

navigationType: NavigationType;

interface NavigationEntry

interface NavigationEntry extends ViewEntry {}

Represents an entry in passed to navigate method.

property animated

animated?: boolean;

True to navigate to the new Page using animated transitions, false otherwise.

property backstackVisible

backstackVisible?: boolean;

True to record the navigation in the backstack, false otherwise. If the parameter is set to false then the Page will be displayed but once navigated from it will not be able to be navigated back to.

property bindingContext

bindingContext?: any;

An object to become the binding context of the page navigating to. Optional.

property clearHistory

clearHistory?: boolean;

True to clear the navigation history, false otherwise. Very useful when navigating away from login pages.

property context

context?: any;

An object passed to the onNavigatedTo callback of the Page. Typically this is used to pass some data among pages. Optional.

property transition

transition?: NavigationTransition;

Specifies an optional navigation transition for all platforms. If not specified, the default platform transition will be used.

property transitionAndroid

transitionAndroid?: NavigationTransition;

Specifies an optional navigation transition for Android. If not specified, the default platform transition will be used.

property transitioniOS

transitioniOS?: NavigationTransition;

Specifies an optional navigation transition for iOS. If not specified, the default platform transition will be used.

interface NavigationTransition

interface NavigationTransition {}

Represents an object specifying a page navigation transition.

property curve

curve?: any;

An optional transition animation curve. Possible values are contained in the [AnimationCurve enumeration](https://docs.nativescript.org/api-reference/modules/_ui_enums_.animationcurve.html). Alternatively, you can pass an instance of type UIViewAnimationCurve for iOS or android.animation.TimeInterpolator for Android.

property duration

duration?: number;

The length of the transition in milliseconds. If you do not specify this, the default platform transition duration will be used.

property instance

instance?: Transition;

An user-defined instance of the "ui/transition".Transition class.

property name

name?: string;

Can be one of the built-in transitions: - curl (same as curlUp) (iOS only) - curlUp (iOS only) - curlDown (iOS only) - explode (Android Lollipop(21) and up only) - fade - flip (same as flipRight) - flipRight - flipLeft - slide (same as slideLeft) - slideLeft - slideRight - slideTop - slideBottom

interface ObservableArray

interface ObservableArray<T> {}

method on

on: {
    (
        eventName: string,
        callback: (data: EventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'change',
        callback: (args: ChangedData<T>) => void,
        thisArg?: any
    ): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.

interface OrientationChangedEventData

interface OrientationChangedEventData extends ApplicationEventData {}

Event data containing information for orientation changed event.

property newValue

newValue: 'portrait' | 'landscape' | 'unknown';

New orientation value.

interface PageBase

interface PageBase {}

method on

on: {
    (
        eventNames: string,
        callback: (data: EventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'navigatingTo',
        callback: (args: NavigatedData) => void,
        thisArg?: any
    ): void;
    (
        event: 'navigatedTo',
        callback: (args: NavigatedData) => void,
        thisArg?: any
    ): void;
    (
        event: 'navigatingFrom',
        callback: (args: NavigatedData) => void,
        thisArg?: any
    ): void;
    (
        event: 'navigatedFrom',
        callback: (args: NavigatedData) => void,
        thisArg?: any
    ): void;
    (
        event: 'showingModally',
        callback: (args: ShownModallyData) => void,
        thisArg?: any
    ): void;
    (
        event: 'shownModally',
        callback: (args: ShownModallyData) => void,
        thisArg?: any
    ): void;
};

interface PanGestureEventData

interface PanGestureEventData extends GestureEventDataWithState {}

Provides gesture event data for pan gesture.

property deltaX

deltaX: number;

property deltaY

deltaY: number;

interface ParserEvent

interface ParserEvent {}

Provides information for a parser event.

property attributes

attributes?: Object;

Returns a JSON object with the attributes of an element in case the eventType is ParserEventType.StartElement.

property data

data?: string;

Returns the relevant data in case the eventType is ParserEventType.Text, ParserEventType.CDATA or ParserEventType.Comment.

property elementName

elementName?: string;

Returns the name of the element in case the eventType is ParserEventType.StartElement or ParserEventType.EndElement.

property eventType

eventType: string;

Returns the type of the parser event. This is one of the ParserEventType static members.

property namespace

namespace?: string;

If namespace processing is enabled, returns the namespace of the element in case the eventType is ParserEventType.StartElement or ParserEventType.EndElement.

property position

position: Position;

Get the position in the xml string where the event was generated.

property prefix

prefix?: string;

If namespace processing is enabled, returns the prefix of the element in case the eventType is ParserEventType.StartElement or ParserEventType.EndElement.

method toString

toString: () => string;

Returns a JSON string representation of this instance.

interface PinchGestureEventData

interface PinchGestureEventData extends GestureEventDataWithState {}

Provides gesture event data for pinch gesture.

property scale

scale: number;

method getFocusX

getFocusX: () => number;

method getFocusY

getFocusY: () => number;

interface PlatformContext

interface PlatformContext {}

Used with qualifier matchers and module resolution

property deviceType

deviceType: string;

property height

height: number;

property os

os: string;

property width

width: number;

interface PromptOptions

interface PromptOptions extends ConfirmOptions {}

Provides options for the prompt dialog.

property capitalizationType

capitalizationType?: string;

Gets or sets the prompt capitalizationType (none, all, sentences, or words).

property defaultText

defaultText?: string;

Gets or sets the default text to display in the input box.

property inputType

inputType?: string;

Gets or sets the prompt input type (plain text, password, or email).

interface PromptResult

interface PromptResult {}

Provides result data from the prompt dialog.

property result

result: boolean;

Gets or sets the prompt dialog boolean result.

property text

text: string;

Gets or sets the text entered in the prompt dialog.

interface PropertyChangeData

interface PropertyChangeData extends EventData {}

Data for the "propertyChange" event.

property oldValue

oldValue?: any;

The previous value of the property.

property propertyName

propertyName: string;

The name of the property that has changed.

property value

value: any;

The new value of the property.

interface RootLayoutOptions

interface RootLayoutOptions {}

property animation

animation?: {
    enterFrom?: TransitionAnimation;
    exitTo?: TransitionAnimation;
};

property shadeCover

shadeCover?: ShadeCoverOptions;

interface RotationGestureEventData

interface RotationGestureEventData extends GestureEventDataWithState {}

Provides gesture event data for rotation gesture.

property rotation

rotation: number;

interface ScrollEventData

interface ScrollEventData extends EventData {}

property scrollX

scrollX: number;

property scrollY

scrollY: number;

interface ShadeCoverOptions

interface ShadeCoverOptions {}

property animation

animation?: {
    enterFrom?: TransitionAnimation; // only applied if first one to be opened
    exitTo?: TransitionAnimation; // only applied if last one to be closed
};

property color

color?: string;

property ignoreShadeRestore

ignoreShadeRestore?: boolean;

property opacity

opacity?: number;

property tapToClose

tapToClose?: boolean;

interface SharedTransitionConfig

interface SharedTransitionConfig {}

property interactive

interactive?: {
    /**
     * Whether you want to allow interactive dismissal.
     * Defaults to using 'pan' gesture for dismissal however you can customize your own.
     */
    dismiss?: SharedTransitionInteractiveOptions;
};

Interactive transition settings. (iOS only at the moment)

property pageEnd

pageEnd?: SharedTransitionPageWithDurationProperties;

View settings applied to the incoming page to end your transition with.

property pageOut

pageOut?: SharedTransitionPageWithDurationProperties;

View settings applied to the outgoing page in your transition.

property pageReturn

pageReturn?: SharedTransitionPageWithDurationProperties & {
    /**
     * In some cases you may want the returning animation to start with the original opacity,
     * instead of beginning where it ended up on pageEnd.
     * Note: you can try enabling this property in cases where your return animation doesn't appear correct.
     */
    useStartOpacity?: boolean;
};

View settings to return to the original page with.

property pageStart

pageStart?: SharedTransitionPageProperties;

View settings applied to the incoming page to start your transition with.

interface ShowModalOptions

interface ShowModalOptions {}

property android

android?: {
    /**
     * @deprecated Use ShowModalOptions.cancelable instead.
     * An optional parameter specifying whether the modal view can be dismissed when not in full-screen mode.
     */
    cancelable?: boolean;
    /**
     * An optional parameter specifying the windowSoftInputMode of the dialog window.
     * For possible values see https://developer.android.com/reference/android/view/WindowManager.LayoutParams#softInputMode
     */
    windowSoftInputMode?: number;
};

property animated

animated?: boolean;

An optional parameter specifying whether to show the modal view with animation.

property cancelable

cancelable?: boolean;

An optional parameter specifying whether the modal view can be dismissed when not in full-screen mode.

property closeCallback

closeCallback: (...args: any[]) => void;

A function that will be called when the view is closed. Any arguments provided when calling ShownModallyData.closeCallback will be available here.

property context

context: any;

Any context you want to pass to the modally shown view. This same context will be available in the arguments of the shownModally event handler.

property fullscreen

fullscreen?: boolean;

An optional parameter specifying whether to show the modal view in full-screen mode.

property ios

ios?: {
    /**
     * The UIModalPresentationStyle to be used when showing the dialog in iOS .
     */
    presentationStyle?: any;
    /**
     * width of the popup dialog
     */
    width?: number;
    /**
     * height of the popup dialog
     */
    height?: number;
};

An optional parameter that specify options specific to iOS as an object.

property stretched

stretched?: boolean;

An optional parameter specifying whether to stretch the modal view when not in full-screen mode.

property transition

transition?: ModalTransitionType;

An optional custom transition effect

interface ShownModallyData

interface ShownModallyData extends EventData {}

Defines the data for the shownModally event.

property closeCallback

closeCallback?: Function;

A callback to call when you want to close the modally shown view. Pass in any kind of arguments and you will receive when the callback parameter of View.showModal is executed.

property context

context?: any;

The context (optional, may be undefined) passed to the view when shown modally.

interface Size

interface Size {}

The Size interface describes abstract dimensions in two dimensional space. It has two properties width and height, representing the width and height values of the size.

property height

height: number;

Represents the height of the size.

property width

width: number;

Represents the width of the size.

interface SwipeGestureEventData

interface SwipeGestureEventData extends GestureEventData {}

Provides gesture event data for swipe gesture.

property direction

direction: SwipeDirection;

interface SystemAppearanceChangedEventData

interface SystemAppearanceChangedEventData extends ApplicationEventData {}

Event data containing information for system appearance changed event.

property newValue

newValue: 'light' | 'dark';

New system appearance value.

interface TapGestureEventData

interface TapGestureEventData extends GestureEventData {}

Provides gesture event data.

method getPointerCount

getPointerCount: () => number;

Gets the number of pointers in the event.

method getX

getX: () => number;

Gets the X coordinate of this event inside the view that triggered the event

method getY

getY: () => number;

Gets the Y coordinate of the event inside the view that triggered the event.

interface Template

interface Template {}

Defines an interface for a View factory function. Commonly used to specify the visualization of data objects.

call signature

(): View;

Call signature of the factory function. Returns a new View instance.

interface TemplatedItemsView

interface TemplatedItemsView {}

property items

items: any[] | ItemsSource;

property itemTemplate

itemTemplate: string | Template;

property itemTemplates

itemTemplates?: string | Array<KeyedTemplate>;

method off

off: (
    event: 'itemLoading',
    callback: (args: EventData) => void,
    thisArg?: any
) => void;

method on

on: (
    event: 'itemLoading',
    callback: (args: ItemEventData) => void,
    thisArg?: any
) => void;

method refresh

refresh: () => void;

interface TimerInfo

interface TimerInfo {}

Contains contains utility methods for profiling. All methods in this module are experimental and may be changed in a non-major version.

property count

count: number;

property totalTime

totalTime: number;

interface TouchGestureEventData

interface TouchGestureEventData extends TapGestureEventData {}

Provides gesture event data.

property action

action: 'up' | 'move' | 'down' | 'cancel';

Gets action of the touch. Possible values: 'up', 'move', 'down', 'cancel'

method getActivePointers

getActivePointers: () => Array<Pointer>;

Gets the pointers that triggered the event. Note: In Android there is aways only one active pointer.

method getAllPointers

getAllPointers: () => Array<Pointer>;

Gets all pointers.

interface TraceErrorHandler

interface TraceErrorHandler {}

An interface used to for handling trace error

method handlerError

handlerError: (error: Error) => any;

interface TraceEventListener

interface TraceEventListener {}

An interface used to trace information about specific event.

property filter

filter: string;

method on

on: (object: Object, name: string, data?: any) => void;

interface TraceWriter

interface TraceWriter {}

An interface used to define a writer used by trace to print (log).

method write

write: (message: any, category: string, type?: number) => void;

interface UnhandledErrorEventData

interface UnhandledErrorEventData extends ApplicationEventData {}

Event data containing information about unhandled application errors.

property android

android?: NativeScriptError;

property error

error: NativeScriptError;

property ios

ios?: NativeScriptError;

interface ViewEntry

interface ViewEntry {}

Represents an entry to be used to create a view or load it form file

property create

create?: () => View;

A function used to create the View instance. Optional.

property moduleName

moduleName?: string;

The name of the module containing the View instance to load. Optional.

interface VirtualArray

interface VirtualArray<T> {}

method on

on: {
    (
        eventName: string,
        callback: (data: EventData) => void,
        thisArg?: any
    ): void;
    (
        event: 'itemsLoading',
        callback: (args: ItemsLoading) => void,
        thisArg?: any
    ): void;
    (
        event: 'change',
        callback: (args: ChangedData<T>) => void,
        thisArg?: any
    ): void;
};

Adds a listener for the specified event name.
Parameter eventName
The name of the event.
Parameter callback
The event listener to add. Will be called when an event of the given name is raised.
Parameter thisArg
An optional parameter which, when set, will be bound as the this context when the callback is called. Falsy values will be not be bound.
Raised when still not loaded items are requested.
Raised when a change occurs.

Enums

enum AccessibilityLiveRegion

enum AccessibilityLiveRegion {
    None = 'none',
    Polite = 'polite',
    Assertive = 'assertive',
}

member Assertive

Assertive = 'assertive'

member None

None = 'none'

member Polite

Polite = 'polite'

enum AccessibilityRole

enum AccessibilityRole {
    Adjustable = 'adjustable',
    Button = 'button',
    Checkbox = 'checkbox',
    Header = 'header',
    Image = 'image',
    ImageButton = 'imageButton',
    KeyboardKey = 'keyboardKey',
    Link = 'link',
    None = 'none',
    PlaysSound = 'plays',
    ProgressBar = 'progressBar',
    RadioButton = 'radioButton',
    Search = 'search',
    SpinButton = 'spinButton',
    StartsMediaSession = 'startsMedia',
    StaticText = 'text',
    Summary = 'summary',
    Switch = 'switch',
}

member Adjustable

Adjustable = 'adjustable'

The element allows continuous adjustment through a range of values.

member Button

Button = 'button'

The element should be treated as a button.

member Checkbox

Checkbox = 'checkbox'

The element behaves like a Checkbox

Header = 'header'

The element is a header that divides content into sections, such as the title of a navigation bar.

member Image

Image = 'image'

The element should be treated as an image.

member ImageButton

ImageButton = 'imageButton'

The element should be treated as a image button.

member KeyboardKey

KeyboardKey = 'keyboardKey'

The element behaves as a keyboard key.

member Link

Link = 'link'

The element should be treated as a link.

member None

None = 'none'

The element has no traits.

member PlaysSound

PlaysSound = 'plays'

The element plays its own sound when activated.

member ProgressBar

ProgressBar = 'progressBar'

The element behaves like a ProgressBar

member RadioButton

RadioButton = 'radioButton'

The element behaves like a RadioButton

member Search

Search = 'search'

The element should be treated as a search field.

member SpinButton

SpinButton = 'spinButton'

The element behaves like a SpinButton

member StartsMediaSession

StartsMediaSession = 'startsMedia'

The element starts a media session when it is activated.

member StaticText

StaticText = 'text'

The element should be treated as static text that cannot change.

member Summary

Summary = 'summary'

The element provides summary information when the application starts.

member Switch

Switch = 'switch'

The element behaves like a switch

enum AccessibilityState

enum AccessibilityState {
    Selected = 'selected',
    Checked = 'checked',
    Unchecked = 'unchecked',
    Disabled = 'disabled',
}

member Checked

Checked = 'checked'

member Disabled

Disabled = 'disabled'

member Selected

Selected = 'selected'

member Unchecked

Unchecked = 'unchecked'

enum AccessibilityTrait

enum AccessibilityTrait {
    AllowsDirectInteraction = 'allowsDirectInteraction',
    CausesPageTurn = 'pageTurn',
    NotEnabled = 'disabled',
    Selected = 'selected',
    UpdatesFrequently = 'frequentUpdates',
}

member AllowsDirectInteraction

AllowsDirectInteraction = 'allowsDirectInteraction'

The element allows direct touch interaction for VoiceOver users.

member CausesPageTurn

CausesPageTurn = 'pageTurn'

The element should cause an automatic page turn when VoiceOver finishes reading the text within it. Note: Requires custom view with accessibilityScroll(...)

member NotEnabled

NotEnabled = 'disabled'

The element is not enabled and does not respond to user interaction.

member Selected

Selected = 'selected'

The element is currently selected.

member UpdatesFrequently

UpdatesFrequently = 'frequentUpdates'

The element frequently updates its label or value.

enum AndroidDirectory

enum AndroidDirectory {
    ALARMS,
    AUDIOBOOKS,
    DCIM,
    DOCUMENTS,
    DOWNLOADS,
    MOVIES,
    MUSIC,
    NOTIFICATIONS,
    PICTURES,
    PODCASTS,
    RINGTONES,
    SCREENSHOTS,
}

member ALARMS

ALARMS

member AUDIOBOOKS

AUDIOBOOKS

member DCIM

DCIM

member DOCUMENTS

DOCUMENTS

member DOWNLOADS

DOWNLOADS

member MOVIES

MOVIES

member MUSIC

MUSIC

member NOTIFICATIONS

NOTIFICATIONS

member PICTURES

PICTURES

member PODCASTS

PODCASTS

member RINGTONES

RINGTONES

member SCREENSHOTS

SCREENSHOTS

enum CacheMode

enum CacheMode {
    none,
    memory,
    diskAndMemory,
}

member diskAndMemory

diskAndMemory

member memory

memory

member none

none

enum FontScaleCategory

enum FontScaleCategory {
    ExtraSmall = 'extra-small',
    Medium = 'medium',
    ExtraLarge = 'extra-large',
}

member ExtraLarge

ExtraLarge = 'extra-large'

member ExtraSmall

ExtraSmall = 'extra-small'

member Medium

Medium = 'medium'

enum GestureEvents

enum GestureEvents {
    gestureAttached = 'gestureAttached',
    touchDown = 'touchDown',
    touchUp = 'touchUp',
}

Events emitted during gesture lifecycle

member gestureAttached

gestureAttached = 'gestureAttached'

When the gesture is attached to the view Provides access to the native gesture recognizer for further customization

member touchDown

touchDown = 'touchDown'

When a touch down was detected

member touchUp

touchUp = 'touchUp'

When a touch up was detected

enum GestureStateTypes

enum GestureStateTypes {
    cancelled = 0,
    began = 1,
    changed = 2,
    ended = 3,
}

Defines an enum with supported gesture states.

member began

began = 1

Gesture began.

member cancelled

cancelled = 0

Gesture canceled.

member changed

changed = 2

Gesture changed.

member ended

ended = 3

Gesture ended.

enum GestureTypes

enum GestureTypes {
    tap = 1,
    doubleTap = 2,
    pinch = 4,
    pan = 8,
    swipe = 16,
    rotation = 32,
    longPress = 64,
    touch = 128,
}

Defines an enum with supported gesture types.

member doubleTap

doubleTap = 2

Denotes double tap gesture.

member longPress

longPress = 64

Denotes long press gesture.

member pan

pan = 8

Denotes pan gesture.

member pinch

pinch = 4

Denotes pinch gesture.

member rotation

rotation = 32

Denotes rotation gesture.

member swipe

swipe = 16

Denotes swipe gesture.

member tap

tap = 1

Denotes tap (click) gesture.

member touch

touch = 128

Denotes touch action.

enum HttpResponseEncoding

enum HttpResponseEncoding {
    UTF8,
    GBK,
}

member GBK

GBK

member UTF8

UTF8

enum ImageSymbolEffects

enum ImageSymbolEffects {
    Appear = 'appear',
    AppearUp = 'appearUp',
    AppearDown = 'appearDown',
    Bounce = 'bounce',
    BounceUp = 'bounceUp',
    BounceDown = 'bounceDown',
    Disappear = 'disappear',
    DisappearDown = 'disappearDown',
    DisappearUp = 'disappearUp',
    Pulse = 'pulse',
    Scale = 'scale',
    ScaleDown = 'scaleDown',
    ScaleUp = 'scaleUp',
    VariableColor = 'variableColor',
    Breathe = 'breathe',
    BreathePlain = 'breathePlain',
    BreathePulse = 'breathePulse',
    Rotate = 'rotate',
    RotateClockwise = 'rotateClockwise',
    RotateCounterClockwise = 'rotateCounterClockwise',
    Wiggle = 'wiggle',
    WiggleBackward = 'wiggleBackward',
    WiggleClockwise = 'wiggleClockwise',
    WiggleCounterClockwise = 'wiggleCounterClockwise',
    WiggleDown = 'wiggleDown',
    WiggleForward = 'wiggleForward',
    WiggleUp = 'wiggleUp',
    WiggleLeft = 'wiggleLeft',
    WiggleRight = 'wiggleRight',
}

member Appear

Appear = 'appear'

member AppearDown

AppearDown = 'appearDown'

member AppearUp

AppearUp = 'appearUp'

member Bounce

Bounce = 'bounce'

member BounceDown

BounceDown = 'bounceDown'

member BounceUp

BounceUp = 'bounceUp'

member Breathe

Breathe = 'breathe'

member BreathePlain

BreathePlain = 'breathePlain'

member BreathePulse

BreathePulse = 'breathePulse'

member Disappear

Disappear = 'disappear'

member DisappearDown

DisappearDown = 'disappearDown'

member DisappearUp

DisappearUp = 'disappearUp'

member Pulse

Pulse = 'pulse'

member Rotate

Rotate = 'rotate'

member RotateClockwise

RotateClockwise = 'rotateClockwise'

member RotateCounterClockwise

RotateCounterClockwise = 'rotateCounterClockwise'

member Scale

Scale = 'scale'

member ScaleDown

ScaleDown = 'scaleDown'

member ScaleUp

ScaleUp = 'scaleUp'

member VariableColor

VariableColor = 'variableColor'

member Wiggle

Wiggle = 'wiggle'

member WiggleBackward

WiggleBackward = 'wiggleBackward'

member WiggleClockwise

WiggleClockwise = 'wiggleClockwise'

member WiggleCounterClockwise

WiggleCounterClockwise = 'wiggleCounterClockwise'

member WiggleDown

WiggleDown = 'wiggleDown'

member WiggleForward

WiggleForward = 'wiggleForward'

member WiggleLeft

WiggleLeft = 'wiggleLeft'

member WiggleRight

WiggleRight = 'wiggleRight'

member WiggleUp

WiggleUp = 'wiggleUp'

enum SharedTransitionAnimationType

enum SharedTransitionAnimationType {
    present = 0,
    dismiss = 1,
}

member dismiss

dismiss = 1

member present

present = 0

enum SwipeDirection

enum SwipeDirection {
    right = 1,
    left = 2,
    up = 4,
    down = 8,
}

Defines an enum for swipe gesture direction.

member down

down = 8

Denotes down direction for swipe gesture.

member left

left = 2

Denotes left direction for swipe gesture.

member right

right = 1

Denotes right direction for swipe gesture.

member up

up = 4

Denotes up direction for swipe gesture.

enum TouchAction

enum TouchAction {
    down = 'down',
    up = 'up',
    move = 'move',
    cancel = 'cancel',
}

Defines a touch action

member cancel

cancel = 'cancel'

Cancel action.

member down

down = 'down'

Down action.

member move

move = 'move'

Move action.

member up

up = 'up'

Up action.

Type Aliases

type dip

type dip = number;

Deprecated
Use CoreTypes.dip instead.

type GridUnitType

type GridUnitType = 'pixel' | 'star' | 'auto';

type Headers

type Headers = { [key: string]: string | string[] };

type HorizontalAlignment

type HorizontalAlignment = CoreTypes.HorizontalAlignmentType;

Deprecated
Use CoreTypes.HorizontalAlignmentType instead.

type InstrumentationMode

type InstrumentationMode = 'counters' | 'timeline' | 'lifecycle';

Profiling mode to use. - counters Accumulates method call counts and times until dumpProfiles is called and then prints aggregated statistic in the console. This is the default. - timeline Outputs method names along start/end timestamps in the console on the go. - lifecycle Outputs basic non-verbose times for startup, navigation, etc.

type LengthDipUnit

type LengthDipUnit = CoreTypes.LengthDipUnit;

Deprecated
Use CoreTypes.LengthDipUnit instead.

type LengthPercentUnit

type LengthPercentUnit = CoreTypes.LengthPercentUnit;

Deprecated
Use CoreTypes.LengthPercentUnit instead.

type LengthPxUnit

type LengthPxUnit = CoreTypes.LengthPxUnit;

Deprecated
Use CoreTypes.LengthPxUnit instead.

type LengthType

type LengthType = CoreTypes.LengthType;

Deprecated
Use CoreTypes.LengthType instead.

type ModuleListProvider

type ModuleListProvider = () => string[];

type percent

type percent = number;

Deprecated
Use CoreTypes.percent instead.

type PercentLengthType

type PercentLengthType = CoreTypes.PercentLengthType;

Deprecated
Use CoreTypes.PercentLengthType instead.

type px

type px = number;

Deprecated
Use CoreTypes.px instead.

type SharedTransitionTagProperties

type SharedTransitionTagProperties = SharedProperties & {
    /**
     * The visual stacking order where 0 is at the bottom.
     * Shared elements are stacked one on top of the other during each transition.
     * By default they are not ordered in any particular fashion.
     */
    zIndex?: number;
    /**
     * Collection of properties to match and animate on each shared element.
     *
     * Defaults to: 'backgroundColor', 'cornerRadius', 'borderWidth', 'borderColor'
     *
     * Tip: Using an empty array, [], for view or layer will avoid copying any properties if desired.
     */
    propertiesToMatch?: SharedTransitionTagPropertiesToMatch;
    /**
     *
     */
    callback?: (view: View, action: SharedTransitionEventAction) => Promise<void>;
};

Properties which can be set on individual Shared Elements

type TouchAnimationOptions

type TouchAnimationOptions = {
    up?: TouchAnimationFn | AnimationDefinition;
    down?: TouchAnimationFn | AnimationDefinition;
};

type VerticalAlignment

type VerticalAlignment = CoreTypes.VerticalAlignmentType;

Deprecated
Use CoreTypes.VerticalAlignmentType instead.

type VisionHoverOptions

type VisionHoverOptions = {
    effect: VisionHoverEffect;
    shape?: VisionHoverShape;
    shapeCornerRadius?: number;
};

type WebViewNavigationType

type WebViewNavigationType =
    | 'linkClicked'
    | 'formSubmitted'
    | 'backForward'
    | 'reload'
    | 'formResubmitted'
    | 'other'
    | undefined;

Represents navigation type

Namespaces

namespace AccessibilityEvents

namespace AccessibilityEvents {}

variable accessibilityBlurEvent

const accessibilityBlurEvent: string;

variable accessibilityFocusChangedEvent

const accessibilityFocusChangedEvent: string;

variable accessibilityFocusEvent

const accessibilityFocusEvent: string;

variable accessibilityPerformEscapeEvent

const accessibilityPerformEscapeEvent: string;

namespace AndroidHelper

namespace AndroidHelper {}

Various Android view helper methods

function clearDrawableColor

clearDrawableColor: (drawable: any) => void;

function getCopyOrDrawable

getCopyOrDrawable: (drawable: any, resources?: any) => any;

function getDrawableColor

getDrawableColor: (drawable: any) => Color;

function setDrawableColor

setDrawableColor: (color: number, drawable: any, blendMode?: any) => void;

namespace ApplicationSettings

module 'application-settings/index.d.ts' {}

Checks whether such a key exists.
Parameter key
The key to check for.

function clear

clear: () => void;

Removes all values.

function flush

flush: () => boolean;

Flush all changes to disk synchronously. boolean flag indicating if changes were saved successfully to disk.

function getAllKeys

getAllKeys: () => Array<string>;

Get all stored keys Array containing all stored keys

function getBoolean

getBoolean: (key: string, defaultValue?: boolean) => boolean;

Gets a value (if existing) for a key as a Boolean Object. A default value can be provided in case there is no existing value.
Parameter key
The key to check for.
Parameter defaultValue
An optional value to be returned in case there is no existing value.

function getNumber

getNumber: (key: string, defaultValue?: number) => number;

Gets a value (if existing) for a key as a Number Object. A default value can be provided in case there is no existing value.
Parameter key
The key to check for.
Parameter defaultValue
An optional value to be returned in case there is no existing value.

function getString

getString: (key: string, defaultValue?: string) => string;

Gets a value (if existing) for a key as a String Object. A default value can be provided in case there is no existing value.
Parameter key
The key to check for.
Parameter defaultValue
An optional value to be returned in case there is no existing value.

function hasKey

hasKey: (key: string) => boolean;

Checks whether such a key exists.
Parameter key
The key to check for.

function remove

remove: (key: string) => void;

Removes a value (if existing) for a key.
Parameter key
The key to check for.

function setBoolean

setBoolean: (key: string, value: boolean) => void;

Sets a Boolean Object for a key.
Parameter key
The key.
Parameter value
The value.

function setNumber

setNumber: (key: string, value: number) => void;

Sets a Number Object for a key.
Parameter key
The key.
Parameter value
The value.

function setString

setString: (key: string, value: string) => void;

Sets a String Object for a key.
Parameter key
The key.
Parameter value
The value.

namespace capitalizationType

namespace capitalizationType {}

Defines the capitalization type for prompt dialog.

variable all

const all: string;

Capitalizes every character.

variable none

const none: string;

No automatic capitalization.

variable sentences

const sentences: string;

Capitalize the first word of each sentence.

variable words

const words: string;

Capitalize the first letter of every word.

namespace Connectivity

module 'connectivity/index.d.ts' {}

Gets the type of connection. Returns a value from the connectivity.connectionType enumeration. To use this method on Android you need to have the android.permission.ACCESS_NETWORK_STATE permission added to the AndroidManifest.xml file.

function getConnectionType

getConnectionType: () => number;

Gets the type of connection. Returns a value from the connectivity.connectionType enumeration. To use this method on Android you need to have the android.permission.ACCESS_NETWORK_STATE permission added to the AndroidManifest.xml file.

function startMonitoring

startMonitoring: (
    connectionTypeChangedCallback: (newConnectionType: number) => void
) => void;

Starts monitoring the connection type.
Parameter connectionTypeChangedCallback
A function that will be called when the connection type changes.

function stopMonitoring

stopMonitoring: () => void;

Stops monitoring the connection type.

enum connectionType

enum connectionType {
    none = 0,
    wifi = 1,
    mobile = 2,
    ethernet = 3,
    bluetooth = 4,
    vpn = 5,
}

Defines the different connection types.

member bluetooth

bluetooth = 4

Denotes a bluetooth connection

member ethernet

ethernet = 3

Denotes an ethernet connection

member mobile

mobile = 2

Denotes a mobile connection, i.e. cellular network or WAN.

member none

none = 0

Denotes no connection.

member vpn

vpn = 5

Denotes a vpn connection

member wifi

wifi = 1

Denotes a WiFi connection.

namespace CoreTypes

namespace CoreTypes {}

variable zeroLength

const zeroLength: LengthType;

type AutocapitalizationInputType

type AutocapitalizationInputType = 'none' | 'words' | 'sentences' | 'allcharacters';

type AutofillType

type AutofillType = 'username' | 'password' | 'none' | string;

type BackgroundRepeatType

type BackgroundRepeatType = 'repeat' | 'repeat-x' | 'repeat-y' | 'no-repeat';

type DeviceOrientationType

type DeviceOrientationType = 'portrait' | 'landscape' | 'unknown';

type dip

type dip = number;

Denotes a length number that is in device independent pixel units.

type DockType

type DockType = 'left' | 'top' | 'right' | 'bottom';

type HorizontalAlignmentType

type HorizontalAlignmentType = 'left' | 'center' | 'right' | 'stretch';

type ImageStretchType

type ImageStretchType = 'none' | 'aspectFill' | 'aspectFit' | 'fill';

type KeyboardInputType

type KeyboardInputType =
    | 'datetime'
    | 'phone'
    | 'number'
    | 'url'
    | 'email'
    | 'integer';

type LengthDipUnit

type LengthDipUnit = {
    readonly unit: 'dip';
    readonly value: dip;
};

type LengthPercentUnit

type LengthPercentUnit = {
    readonly unit: '%';
    readonly value: percent;
};

type LengthPxUnit

type LengthPxUnit = {
    readonly unit: 'px';
    readonly value: px;
};

type LengthType

type LengthType = 'auto' | dip | LengthDipUnit | LengthPxUnit;

type MaxLinesType

type MaxLinesType = number;

type OrientationType

type OrientationType = 'horizontal' | 'vertical';

type percent

type percent = number;

Denotes a normalized percent number. 0% is represented as 0 50% is represented as 0.5 100% is represented as 1

type PercentLengthType

type PercentLengthType =
    | 'auto'
    | dip
    | LengthDipUnit
    | LengthPxUnit
    | LengthPercentUnit;

type px

type px = number;

Denotes a length number that is in physical device pixels.

type ReturnKeyButtonType

type ReturnKeyButtonType = 'done' | 'next' | 'go' | 'search' | 'send';

type TextAlignmentType

type TextAlignmentType = 'initial' | 'left' | 'center' | 'right' | 'justify';

type TextDecorationType

type TextDecorationType =
    | 'none'
    | 'underline'
    | 'line-through'
    | 'underline line-through';

type TextOverflowType

type TextOverflowType = 'clip' | 'ellipsis' | 'initial' | 'unset';

type TextTransformType

type TextTransformType =
    | 'initial'
    | 'none'
    | 'capitalize'
    | 'uppercase'
    | 'lowercase';

type UpdateTextTriggerType

type UpdateTextTriggerType = 'focusLost' | 'textChanged';

type VerticalAlignmentTextType

type VerticalAlignmentTextType =
    | VerticalAlignmentType
    | 'text-top'
    | 'text-bottom'
    | 'sup'
    | 'sub'
    | 'baseline';

type VerticalAlignmentType

type VerticalAlignmentType = 'top' | 'middle' | 'bottom' | 'stretch';

type VisibilityType

type VisibilityType = 'visible' | 'hidden' | 'collapse' | 'collapsed';

type WhiteSpaceType

type WhiteSpaceType = 'initial' | 'normal' | 'nowrap';

namespace CoreTypes.Accuracy

namespace CoreTypes.Accuracy {}

variable any

const any: number;

variable high

const high: number;

namespace CoreTypes.AndroidActionBarIconVisibility

namespace CoreTypes.AndroidActionBarIconVisibility {}

variable always

const always: string;

variable auto

const auto: string;

variable never

const never: string;

namespace CoreTypes.AndroidActionItemPosition

namespace CoreTypes.AndroidActionItemPosition {}

variable actionBar

const actionBar: string;

variable actionBarIfRoom

const actionBarIfRoom: string;

const popup: string;

namespace CoreTypes.AnimationCurve

namespace CoreTypes.AnimationCurve {}

variable ease

const ease: string;

variable easeIn

const easeIn: string;

variable easeInOut

const easeInOut: string;

variable easeOut

const easeOut: string;

variable linear

const linear: string;

variable spring

const spring: string;

function cubicBezier

cubicBezier: (
    x1: number,
    y1: number,
    x2: number,
    y2: number
) => animationModule.CubicBezierAnimationCurve;

namespace CoreTypes.AutocapitalizationType

namespace CoreTypes.AutocapitalizationType {}

variable allCharacters

const allCharacters: AutocapitalizationInputType;

variable none

const none: AutocapitalizationInputType;

variable sentences

const sentences: AutocapitalizationInputType;

variable words

const words: AutocapitalizationInputType;

namespace CoreTypes.AutofillType

namespace CoreTypes.AutofillType {}

variable newPassword

const newPassword: string;

variable newUsername

const newUsername: string;

variable none

const none: string;

variable oneTimeCode

const oneTimeCode: string;

variable password

const password: string;

variable username

const username: string;

namespace CoreTypes.BackgroundRepeat

namespace CoreTypes.BackgroundRepeat {}

variable noRepeat

const noRepeat: BackgroundRepeatType;

variable repeat

const repeat: BackgroundRepeatType;

variable repeatX

const repeatX: BackgroundRepeatType;

variable repeatY

const repeatY: BackgroundRepeatType;

function isValid

isValid: (value: any) => value is BackgroundRepeatType;

function parse

parse: (value: any) => BackgroundRepeatType;

namespace CoreTypes.DeviceOrientation

namespace CoreTypes.DeviceOrientation {}

variable landscape

const landscape: string;

variable portrait

const portrait: string;

variable unknown

const unknown: string;

namespace CoreTypes.DeviceType

namespace CoreTypes.DeviceType {}

variable Phone

const Phone: string;

variable Tablet

const Tablet: string;

namespace CoreTypes.Dock

namespace CoreTypes.Dock {}

variable bottom

const bottom: DockType;

variable left

const left: DockType;

variable right

const right: DockType;

variable top

const top: DockType;

namespace CoreTypes.FontAttributes

namespace CoreTypes.FontAttributes {}

variable Bold

const Bold: number;

variable Italic

const Italic: number;

variable Normal

const Normal: number;

namespace CoreTypes.FontStyle

namespace CoreTypes.FontStyle {}

variable italic

const italic: string;

variable normal

const normal: string;

namespace CoreTypes.FontWeight

namespace CoreTypes.FontWeight {}

variable black

const black: string;

variable bold

const bold: string;

variable extraBold

const extraBold: string;

variable extraLight

const extraLight: string;

variable light

const light: string;

variable medium

const medium: string;

variable normal

const normal: string;

variable semiBold

const semiBold: string;

variable thin

const thin: string;

namespace CoreTypes.HorizontalAlignment

namespace CoreTypes.HorizontalAlignment {}

variable center

const center: string;

variable left

const left: string;

variable right

const right: string;

variable stretch

const stretch: string;

function isValid

isValid: (value: any) => value is HorizontalAlignmentType;

function parse

parse: (value: any) => HorizontalAlignmentType;

namespace CoreTypes.ImageFormat

namespace CoreTypes.ImageFormat {}

variable jpeg

const jpeg: string;

variable jpg

const jpg: string;

variable png

const png: string;

namespace CoreTypes.ImageStretch

namespace CoreTypes.ImageStretch {}

variable aspectFill

const aspectFill: ImageStretchType;

variable aspectFit

const aspectFit: ImageStretchType;

variable fill

const fill: ImageStretchType;

variable none

const none: ImageStretchType;

namespace CoreTypes.IOSActionItemPosition

namespace CoreTypes.IOSActionItemPosition {}

variable left

const left: string;

variable right

const right: string;

namespace CoreTypes.KeyboardType

namespace CoreTypes.KeyboardType {}

variable datetime

const datetime: string;

variable email

const email: string;

variable integer

const integer: string;

variable number

const number: string;

variable phone

const phone: string;

variable url

const url: string;

namespace CoreTypes.NavigationBarVisibility

namespace CoreTypes.NavigationBarVisibility {}

variable always

const always: string;

variable auto

const auto: string;

variable never

const never: string;

namespace CoreTypes.Orientation

namespace CoreTypes.Orientation {}

variable horizontal

const horizontal: string;

variable vertical

const vertical: string;

namespace CoreTypes.ReturnKeyType

namespace CoreTypes.ReturnKeyType {}

variable done

const done: string;

variable go

const go: string;

variable next

const next: string;

variable search

const search: string;

variable send

const send: string;

namespace CoreTypes.StatusBarStyle

namespace CoreTypes.StatusBarStyle {}

variable dark

const dark: string;

variable light

const light: string;

namespace CoreTypes.SystemAppearance

namespace CoreTypes.SystemAppearance {}

variable dark

const dark: string;

variable light

const light: string;

namespace CoreTypes.TextAlignment

namespace CoreTypes.TextAlignment {}

variable center

const center: string;

variable justify

const justify: string;

variable left

const left: string;

variable right

const right: string;

namespace CoreTypes.TextDecoration

namespace CoreTypes.TextDecoration {}

variable lineThrough

const lineThrough: string;

variable none

const none: string;

variable underline

const underline: string;

namespace CoreTypes.TextOverflow

namespace CoreTypes.TextOverflow {}

variable clip

const clip: string;

variable ellipsis

const ellipsis: string;

variable initial

const initial: string;

variable unset

const unset: string;

namespace CoreTypes.TextTransform

namespace CoreTypes.TextTransform {}

variable capitalize

const capitalize: string;

variable lowercase

const lowercase: string;

variable none

const none: string;

variable uppercase

const uppercase: string;

namespace CoreTypes.UpdateTextTrigger

namespace CoreTypes.UpdateTextTrigger {}

variable focusLost

const focusLost: UpdateTextTriggerType;

variable textChanged

const textChanged: UpdateTextTriggerType;

namespace CoreTypes.VerticalAlignment

namespace CoreTypes.VerticalAlignment {}

variable bottom

const bottom: string;

variable middle

const middle: string;

variable stretch

const stretch: string;

variable top

const top: string;

namespace CoreTypes.VerticalAlignmentText

namespace CoreTypes.VerticalAlignmentText {}

variable baseline

const baseline: string;

variable bottom

const bottom: string;

variable middle

const middle: string;

variable stretch

const stretch: string;

variable sub

const sub: string;

variable sup

const sup: string;

variable textbottom

const textbottom: string;

variable texttop

const texttop: string;

variable top

const top: string;

function isValid

isValid: (value: any) => value is VerticalAlignmentTextType;

function parse

parse: (value: string) => VerticalAlignmentTextType;

namespace CoreTypes.Visibility

namespace CoreTypes.Visibility {}

variable collapse

const collapse: VisibilityType;

variable collapsed

const collapsed: VisibilityType;

variable hidden

const hidden: VisibilityType;

variable visible

const visible: VisibilityType;

function isValid

isValid: (value: any) => value is VisibilityType;

function parse

parse: (value: string) => VisibilityType;

namespace CoreTypes.WhiteSpace

namespace CoreTypes.WhiteSpace {}

variable normal

const normal: string;

variable nowrap

const nowrap: string;

namespace CSSUtils

namespace CSSUtils {}

variable CLASS_PREFIX

const CLASS_PREFIX: string;

variable MODAL_ROOT_VIEW_CSS_CLASS

const MODAL_ROOT_VIEW_CSS_CLASS: string;

variable ROOT_VIEW_CSS_CLASS

const ROOT_VIEW_CSS_CLASS: string;

function getModalRootViewCssClass

getModalRootViewCssClass: () => string;

function getRootViewCssClasses

getRootViewCssClasses: () => string[];

function getSystemCssClasses

getSystemCssClasses: () => string[];

function pushToRootViewCssClasses

pushToRootViewCssClasses: (value: string) => number;

function pushToSystemCssClasses

pushToSystemCssClasses: (value: string) => number;

function removeFromRootViewCssClasses

removeFromRootViewCssClasses: (value: string) => string;

function removeSystemCssClass

removeSystemCssClass: (value: string) => string;

namespace DialogStrings

namespace DialogStrings {}

variable ALERT

const ALERT: string;

variable CANCEL

const CANCEL: string;

variable CONFIRM

const CONFIRM: string;

const LOGIN: string;

variable OK

const OK: string;

variable PROMPT

const PROMPT: string;

variable STRING

const STRING: string;

namespace encoding

namespace encoding {}

Defines the supported character encodings.

variable ISO_8859_1

const ISO_8859_1: any;

Denotes ISO-8859-1 character encoding.

variable US_ASCII

const US_ASCII: any;

Denotes US_ASCII character encoding.

variable UTF_16

const UTF_16: any;

Denotes UTF_16 character encoding.

variable UTF_16BE

const UTF_16BE: any;

Denotes UTF_16BE character encoding.

variable UTF_16LE

const UTF_16LE: any;

Denotes UTF_16LE character encoding.

variable UTF_8

const UTF_8: any;

Denotes UTF_8 character encoding.

namespace FontStyle

namespace FontStyle {}

variable ITALIC

const ITALIC: string;

variable NORMAL

const NORMAL: string;

function isValid

isValid: (value: any) => boolean;

function parse

parse: (value: string) => FontStyleType;

namespace FontVariationSettings

namespace FontVariationSettings {}

function parse

parse: (
    fontVariationSettings: string
) => Array<FontVariationSettingsType> | null;

function toString

toString: (
    fontVariationSettings: Array<FontVariationSettingsType> | null
) => string | null;

namespace FontWeight

namespace FontWeight {}

variable BLACK

const BLACK: string;

variable BOLD

const BOLD: string;

variable EXTRA_BOLD

const EXTRA_BOLD: string;

variable EXTRA_LIGHT

const EXTRA_LIGHT: string;

variable LIGHT

const LIGHT: string;

variable MEDIUM

const MEDIUM: string;

variable NORMAL

const NORMAL: string;

variable SEMI_BOLD

const SEMI_BOLD: string;

variable THIN

const THIN: string;

function isValid

isValid: (value: any) => boolean;

function parse

parse: (value: string) => FontWeightType;

namespace GridUnitType

namespace GridUnitType {}

variable AUTO

const AUTO: string;

variable PIXEL

const PIXEL: string;

variable STAR

const STAR: string;

function isValid

isValid: (value: any) => boolean;

function parse

parse: (value: string) => GridUnitType;

namespace Http

module 'http/index.d.ts' {}

Downloads the content from the specified URL as a string.
Parameter url
The URL to request from.

function getBinary

getBinary: {
    (url: string): Promise<ArrayBuffer>;
    (options: HttpRequestOptions): Promise<ArrayBuffer>;
};

Downloads the content from the specified URL as binary and returns an ArrayBuffer.
Parameter url
The URL to request from.
Downloads the content from the specified URL as binary and returns an ArrayBuffer.
Parameter options
An object that specifies various request options.

function getFile

getFile: {
    (url: string, destinationFilePath?: string): Promise<File>;
    (options: HttpRequestOptions, destinationFilePath?: string): Promise<File>;
};

Downloads the content from the specified URL and attempts to save it as file.
Parameter url
The URL to request from.
Parameter destinationFilePath
Optional. The downloaded file path.
Downloads the content from the specified URL and attempts to save it as file.
Parameter options
An object that specifies various request options.
Parameter destinationFilePath
Optional. The downloaded file path.

function getImage

getImage: {
    (url: string): Promise<ImageSource>;
    (options: HttpRequestOptions): Promise<ImageSource>;
};

Downloads the content from the specified URL and attempts to decode it as an image.
Parameter url
The URL to request from.
Downloads the content from the specified URL and attempts to decode it as an image.
Parameter options
An object that specifies various request options.

function getJSON

getJSON: {
    <T>(url: string): Promise<T>;
    <T>(options: HttpRequestOptions): Promise<T>;
};

Downloads the content from the specified URL as a string and returns its JSON.parse representation.
Parameter url
The URL to request from.
Downloads the content from the specified URL as a string and returns its JSON.parse representation.
Parameter options
An object that specifies various request options.

function getString

getString: {
    (url: string): Promise<string>;
    (options: HttpRequestOptions): Promise<string>;
};

Downloads the content from the specified URL as a string.
Parameter url
The URL to request from.
Downloads the content from the specified URL as a string.
Parameter options
An object that specifies various request options.

function request

request: (options: HttpRequestOptions) => Promise<HttpResponse>;

Makes a generic http request using the provided options and returns a HttpResponse Object.
Parameter options
An object that specifies various request options.

interface HttpContent

interface HttpContent {}

Encapsulates the content of an HttpResponse.

property raw

raw: any;

Gets the response body as raw data.

property toArrayBuffer

toArrayBuffer: () => ArrayBuffer;

Gets the response body as ArrayBuffer

property toFile

toFile: (destinationFilePath?: string) => File;

Gets the response body as file.

property toImage

toImage: () => Promise<ImageSource>;

Gets the response body as ImageSource.

property toJSON

toJSON: (encoding?: HttpResponseEncoding) => any;

Gets the response body as JSON object.

property toString

toString: (encoding?: HttpResponseEncoding) => string;

Gets the response body as string.

interface HttpRequestOptions

interface HttpRequestOptions {}

Provides options for the http requests.

property content

content?: string | FormData | ArrayBuffer;

Gets or sets the request body.

property dontFollowRedirects

dontFollowRedirects?: boolean;

Gets or sets wether to *not* follow server's redirection responses.

property headers

headers?: any;

Gets or sets the request headers in JSON format.

property method

method: string;

Gets or sets the request method.

property timeout

timeout?: number;

Gets or sets the request timeout in milliseconds.

property url

url: string;

Gets or sets the request url.

interface HttpResponse

interface HttpResponse {}

Encapsulates HTTP-response information from an HTTP-request.

property content

content?: HttpContent;

Gets the response content.

property headers

headers: Headers;

Gets the response headers.

property statusCode

statusCode: number;

Gets the response status code.

enum HttpResponseEncoding

enum HttpResponseEncoding {
    UTF8,
    GBK,
}

member GBK

GBK

member UTF8

UTF8

type Headers

type Headers = { [key: string]: string | string[] };

namespace inputType

namespace inputType {}

Defines the input type for prompt dialog.

variable decimal

const decimal: string;

Decimal input type.

variable email

const email: string;

Email input type.

variable number

const number: string;

Number input type.

variable password

const password: string;

Password input type.

variable phone

const phone: string;

Phone input type.

variable text

const text: string;

Plain text input type.

namespace IOSHelper

namespace IOSHelper {}

Various iOS view helper methods

variable traitCollectionColorAppearanceChangedEvent

const traitCollectionColorAppearanceChangedEvent: string;

String value used when hooking to traitCollectionColorAppearanceChangedEvent event.

function expandBeyondSafeArea

expandBeyondSafeArea: (view: View, frame: any) => any;

function getFrameFromPosition

getFrameFromPosition: (
    position: { left; top; right; bottom },
    insets?: { left; top; right; bottom }
) => any;

function getParentWithViewController

getParentWithViewController: (view: View) => View;

Returns a view with viewController or undefined if no such found along the view's parent chain.
Parameter view
The view form which to start the search.

function getPositionFromFrame

getPositionFromFrame: (frame: any) => { left; top; right; bottom };

function layoutView

layoutView: (controller: any, owner: View) => void;

function shrinkToSafeArea

shrinkToSafeArea: (view: View, frame: any) => any;

function updateAutoAdjustScrollInsets

updateAutoAdjustScrollInsets: (controller: any, owner: View) => void;

function updateConstraints

updateConstraints: (controller: any, owner: View) => void;

class UIAdaptivePresentationControllerDelegateImp

class UIAdaptivePresentationControllerDelegateImp {}

method initWithOwnerAndCallback

static initWithOwnerAndCallback: (
    owner: WeakRef<View>,
    whenClosedCallback: Function
) => UIAdaptivePresentationControllerDelegateImp;

class UILayoutViewController

class UILayoutViewController {}

method initWithOwner

static initWithOwner: (owner: WeakRef<View>) => UILayoutViewController;

class UIPopoverPresentationControllerDelegateImp

class UIPopoverPresentationControllerDelegateImp {}

method initWithOwnerAndCallback

static initWithOwnerAndCallback: (
    owner: WeakRef<View>,
    whenClosedCallback: Function
) => UIPopoverPresentationControllerDelegateImp;

namespace knownFolders

namespace knownFolders {}

Provides access to the top-level Folders instances that are accessible from the application. Use these as entry points to access the FileSystem.

function currentApp

currentApp: () => Folder;

Gets the root folder for the current application. This Folder is private for the application and not accessible from Users/External apps. iOS - this folder is read-only and contains the app and all its resources.

function documents

documents: () => Folder;

Gets the Documents folder available for the current application. This Folder is private for the application and not accessible from Users/External apps.

function externalDocuments

externalDocuments: () => Folder;

Gets the Documents folder available for the current application on an external storage. This Folder is private for the application and not accessible from Users/External apps. On android this requires READ_EXTERNAL_STORAGE/WRITE_EXTERNAL_STORAGE permissions There is no external storage on iOS os it is the same as documents()

function temp

temp: () => Folder;

Gets the Temporary (Caches) folder available for the current application. This Folder is private for the application and not accessible from Users/External apps.

namespace knownFolders.ios

namespace knownFolders.ios {}

Contains iOS-specific known folders.

function desktop

desktop: () => Folder;

Gets the NSDesktopDirectory. Note that the folder will not be created if it did not exist.

function developer

developer: () => Folder;

Gets the NSDeveloperDirectory. Note that the folder will not be created if it did not exist.

function downloads

downloads: () => Folder;

Gets the NSDownloadsDirectory. Note that the folder will not be created if it did not exist.

function library

library: () => Folder;

Gets the NSLibraryDirectory. Note that the folder will not be created if it did not exist.

function movies

movies: () => Folder;

Gets the NSMoviesDirectory. Note that the folder will not be created if it did not exist.

function music

music: () => Folder;

Gets the NSMusicDirectory. Note that the folder will not be created if it did not exist.

function pictures

pictures: () => Folder;

Gets the NSPicturesDirectory. Note that the folder will not be created if it did not exist.

function sharedPublic

sharedPublic: () => Folder;

Gets the NSSharedPublicDirectory. Note that the folder will not be created if it did not exist.

namespace Length

namespace Length {}

function convertToString

convertToString: (length: CoreTypes.LengthType) => string;

function equals

equals: (a: CoreTypes.LengthType, b: CoreTypes.LengthType) => boolean;

function parse

parse: (text: string) => CoreTypes.LengthType;

function toDevicePixels

toDevicePixels: (length: CoreTypes.LengthType, auto?: number) => number;

Converts Length unit to device pixels.
Parameter length
The Length to convert.
Parameter auto
Value to use for conversion of "auto". By default is Math.NaN.

namespace path

namespace path {}

Enables path-specific operations like join, extension, etc.

variable separator

const separator: string;

Gets the string used to separate file paths.

function join

join: (...paths: string[]) => string;

Joins all the provided string components, forming a valid and normalized path.
Parameter paths
An array of string components to be joined.

function normalize

normalize: (path: string) => string;

Normalizes a path, taking care of occurrances like ".." and "//".
Parameter path
The path to be normalized.

namespace PercentLength

namespace PercentLength {}

function convertToString

convertToString: (length: CoreTypes.PercentLengthType) => string;

function equals

equals: (
    a: CoreTypes.PercentLengthType,
    b: CoreTypes.PercentLengthType
) => boolean;

function parse

parse: (text: string) => CoreTypes.PercentLengthType;

function toDevicePixels

toDevicePixels: (
    length: CoreTypes.PercentLengthType,
    auto?: number,
    parentAvailableWidth?: CoreTypes.px
) => number;

Converts PercentLengthType unit to device pixels.
Parameter length
The PercentLengthType to convert.
Parameter auto
Value to use for conversion of "auto". By default is Math.NaN.
Parameter parentAvailableWidth
Value to use as base when converting percent unit. By default is Math.NaN.

namespace Trace

namespace Trace {}

function addCategories

addCategories: (categories: string) => void;

Adds categories to existing categories the module will trace.
Parameter categories
The comma-separated list of categories. If not specified all messages from all categories will be traced.

function addEventListener

addEventListener: (listener: TraceEventListener) => void;

function addWriter

addWriter: (writer: TraceWriter) => void;

Adds a TraceWriter instance to the trace module.
Parameter writer
The TraceWriter instance to add.

function clearWriters

clearWriters: () => void;

Clears all the writers from the trace module.

function disable

disable: () => void;

Disables the trace module.

function enable

enable: () => void;

Enables the trace module.

function error

error: (error: string | Error) => void;

Passes an error to the registered ErrorHandler
Parameter error
The error to be handled.

function getErrorHandler

getErrorHandler: () => TraceErrorHandler;

function isCategorySet

isCategorySet: (category: string) => boolean;

Check if category is already set in trace module.
Parameter category
The category to check.

function isEnabled

isEnabled: () => boolean;

A function that returns whether the tracer is enabled and there is a point in writing messages. Check this to avoid writing complex string templates. Send error messages even if tracing is disabled.

function notifyEvent

notifyEvent: (object: Object, name: string, data?: any) => void;

Notifies all the attached listeners for an event that has occurred in the sender object.
Parameter object
The Object instance that raised the event.
Parameter name
The name of the raised event.
Parameter data
An optional parameter that passes the data associated with the event.

function removeEventListener

removeEventListener: (listener: TraceEventListener) => void;

function removeWriter

removeWriter: (writer: TraceWriter) => void;

Removes a TraceWriter instance from the trace module.
Parameter writer
The TraceWriter instance to remove.

function setCategories

setCategories: (categories: string) => void;

Sets the categories the module will trace.
Parameter categories
The comma-separated list of categories. If not specified all messages from all categories will be traced.

function setErrorHandler

setErrorHandler: (handler: TraceErrorHandler) => void;

function write

write: (message: any, category: string, type?: number) => void;

Writes a message using the available writers.
Parameter message
The message to be written.
Parameter category
The category of the message.
Parameter type
Optional, the type of the message - info, warning, error.

class ConsoleWriter

class ConsoleWriter implements TraceWriter {}

method write

write: (message: any, category: string, type?: number) => void;

class DefaultErrorHandler

class DefaultErrorHandler implements TraceErrorHandler {}

method handlerError

handlerError: (error: any) => void;

namespace Trace.categories

namespace Trace.categories {}

all predefined categories.

variable All

const All: string;

variable Animation

const Animation: string;

variable Binding

const Binding: string;

variable BindingError

const BindingError: string;

variable Debug

const Debug: string;

variable Error

const Error: string;

variable Layout

const Layout: string;

variable Livesync

const Livesync: string;

variable MediaQuery

const MediaQuery: string;

variable ModuleNameResolver

const ModuleNameResolver: string;

variable NativeLifecycle

const NativeLifecycle: string;

const Navigation: string;

variable separator

const separator: string;

variable Style

const Style: string;

variable Test

const Test: string;

variable Transition

const Transition: string;

variable ViewHierarchy

const ViewHierarchy: string;

variable VisualTreeEvents

const VisualTreeEvents: string;

function concat

concat: (...args: any) => string;

namespace Trace.messageType

namespace Trace.messageType {}

variable error

const error: number;

variable info

const info: number;

variable log

const log: number;

variable warn

const warn: number;

namespace Utils

module 'utils/index.d.ts' {}

Used by various android event listener implementations.

variable CORE_ANIMATION_DEFAULTS

const CORE_ANIMATION_DEFAULTS: {
    duration: number;
    spring: { tension: number; friction: number; mass: number; velocity: number };
};

Default animation values used throughout core

variable debug

let debug: boolean;

A runtime option indicating whether the build has debugging enabled.

variable FILE_PREFIX

const FILE_PREFIX: string;

variable RESOURCE_PREFIX

const RESOURCE_PREFIX: string;

variable SDK_VERSION

const SDK_VERSION: number;

variable SYSTEM_PREFIX

const SYSTEM_PREFIX: string;

function clearInterval

clearInterval: (id: number) => void;

Clears repeated function which was set up by calling setInterval().
Parameter id
The identifier returned by the setInterval() method.

function clearTimeout

clearTimeout: (id: number) => void;

Clears the delay set by a call to the setTimeout function.
Parameter id
The identifier returned by the previously called setTimeout() method.

function convertString

convertString: (value: any) => any;

Converts string value to number or boolean.
Parameter value
The original value.

function copyToClipboard

copyToClipboard: (value: string) => void;

Copy value to device clipboard.

function dataDeserialize

dataDeserialize: (nativeData?: any) => any;

Data deserialization from Native > JS
Parameter nativeData
Native platform data

function dataSerialize

dataSerialize: (data?: any, wrapPrimitives?: boolean) => any;

Data serialization from JS > Native
Parameter wrapPrimitives
Optionally wrap primitive types (Some APIs may require this)

function debounce

debounce: <T extends Function = any>(
    fn: T,
    delay?: number,
    options?: { leading?: boolean }
) => T;

A simple debounce utility
Parameter fn
Function to debounce
Parameter delay
Customize the delay (default is 300ms)

function dismissKeyboard

dismissKeyboard: () => void;

Dismiss any keyboard visible on the screen.

function dismissSoftInput

dismissSoftInput: (nativeView?: any) => void;

Hides the soft input method, usually a soft keyboard.

function dispatchToMainThread

dispatchToMainThread: (func: Function) => any;

Dispatches the passed function for execution on the main thread
Parameter func
The function to execute on the main thread.

function dispatchToUIThread

dispatchToUIThread: (func: Function) => any;

Dispatches the passed function for execution on the UI thread
Parameter func
The function to execute on the UI thread.

function eliminateDuplicates

eliminateDuplicates: (arr: Array<any>) => Array<any>;

Removes duplicate elements from array.
Parameter arr
The array.

function escapeRegexSymbols

escapeRegexSymbols: (source: string) => string;

Escapes special regex symbols (., *, ^, $ and so on) in string in order to create a valid regex from it.
Parameter source
The original value.

function executeOnMainThread

executeOnMainThread: (func: Function) => any;

Checks if the current thread is the main thread. Directly calls the passed function if it is, or dispatches it to the main thread otherwise.
Parameter func
The function to execute on the main thread.

function executeOnUIThread

executeOnUIThread: (func: Function) => any;

Runs the passed function on the UI Thread.
Parameter func
The function to execute on the UI thread.

function GC

GC: () => any;

An utility function that invokes garbage collection on the JavaScript side.

function getBaseClasses

getBaseClasses: (object: any) => Array<string>;

A function that gets the entire class hierarchy of an object.
Parameter object
The object. Returns an array of strings with the name of all base classes.

function getClass

getClass: (object: any) => string;

A function that gets the class name of an object.
Parameter object
The object. Returns a string with the name of the class.

function getClassInfo

getClassInfo: (object: Object) => ClassInfo;

A function that gets the ClassInfo for an object.
Parameter object
The object. Returns a ClassInfo for the object.

function getDurationWithDampingFromSpring

getDurationWithDampingFromSpring: (springSettings?: {
    tension?: number;
    friction?: number;
    mass?: number;
    velocity?: number;
}) => { duration: number; damping: number };

Get a duration with damping value from various spring related settings. Helpful when needing to convert spring settings to isolated duration value.
Parameter springSettings
various spring settings
Returns
calculated duration with damping from spring settings

function getFileExtension

getFileExtension: (path: string) => string;

Get file extension from file path
Parameter path
file path
Returns
file extension

function getModuleName

getModuleName: (path: string) => string;

Gets module name from path.
Parameter path
The module path.

function hasDuplicates

hasDuplicates: (arr: Array<any>) => boolean;

Checks if array has any duplicate elements.
Parameter arr
The array to be checked.

function isBoolean

isBoolean: (value: any) => boolean;

A function that checks if something is a valid boolean.
Parameter value
The value which will be checked. Returns true if value is a boolean.

function isDataURI

isDataURI: (uri: string) => boolean;

Returns true if the specified URI is data URI (http://en.wikipedia.org/wiki/Data_URI_scheme).
Parameter uri
The URI.

function isDefined

isDefined: (value: any) => boolean;

A function that checks if something is defined (not undefined).
Parameter value
The value which will be checked. Returns true if value is defined.

function isEmoji

isEmoji: (value: string) => boolean;

function isFileOrResourcePath

isFileOrResourcePath: (path: string) => boolean;

Returns true if the specified path points to a resource or local file.
Parameter path
The path.

function isFontIconURI

isFontIconURI: (uri: string) => boolean;

Returns true if the specified URI is a font icon URI like "fontIcon://&#xf1e0".
Parameter uri
The URI.

function isFunction

isFunction: (value: any) => boolean;

A function that checks if something is a function.
Parameter value
The value which will be checked. Returns true if value is a function.

function isMainThread

isMainThread: () => boolean;

Returns
Boolean value indicating whether the current thread is the main thread

function isNullOrUndefined

isNullOrUndefined: (value: any) => boolean;

A function that checks if something is not defined (null or undefined).
Parameter value
The value which will be checked. Returns true if value is null or undefined.

function isNumber

isNumber: (value: any) => boolean;

A function that checks if something is a valid number.
Parameter value
The value which will be checked. Returns true if value is a number.

function isObject

isObject: (value: any) => boolean;

A function that checks if something is an object.
Parameter value
The value which will be checked. Returns true if value is an object.

function isRealDevice

isRealDevice: () => boolean;

Checks whether the application is running on real device and not on simulator/emulator.

function isString

isString: (value: any) => boolean;

A function that checks if something is a valid string.
Parameter value
The value which will be checked. Returns true if value is a string.

function isUndefined

isUndefined: (value: any) => boolean;

A function that checks if something is "undefined".
Parameter value
The value which will be checked. Returns true if value is "undefined".

function mainThreadify

mainThreadify: (func: Function) => (...args: any[]) => void;

Returns a function wrapper which executes the supplied function on the main thread. The wrapper behaves like the original function and passes all of its arguments BUT discards its return value.
Parameter func
The function to execute on the main thread
Returns
The wrapper function which schedules execution to the main thread

function merge

merge: (left: any, right: any, compareFunc: any) => any[];

function mergeSort

mergeSort: (
    arr: Array<any>,
    compareFunc: (a: any, b: any) => number
) => Array<any>;

Sorts an array by using merge sort algorithm (which ensures stable sort since the built-in Array.sort() does not promise a stable sort).
Parameter arr
array to be sorted
Parameter compareFunc
function that will be used to compare two elements of the array

function numberHasDecimals

numberHasDecimals: (value: number) => boolean;

Checks if the number has decimals
Parameter value
Number to check

function numberIs64Bit

numberIs64Bit: (value: number) => boolean;

Checks if the number is 64 bit
Parameter value
Number to check

function openFile

openFile: (filePath: string, title?: string) => boolean;

Opens file.
Parameter filePath
The file.
Parameter title
Optional title for Android. Default is: 'Open File...'

function openUrl

openUrl: (url: string) => boolean;

Opens url.
Parameter url
The url.

function queueGC

queueGC: (delay?: number, useThrottle?: boolean) => any;

An utility function that queues a garbage collection, multiple calls in quick succession are debounced by default and only one gc will be executed after 900ms.
Parameter delay
Customize the delay
Parameter useThrottle
Instead of default debounce strategy, use throttling

function queueMacrotask

queueMacrotask: (task: () => void) => void;

Queues the passed function to be ran in a macroTask
Parameter task
the function to execute as a macroTask

function releaseNativeObject

releaseNativeObject: (object: any) => any;

Releases the reference to the wrapped native object
Parameter object
The Java/Objective-C object to release.

function sanitizeModuleName

sanitizeModuleName: (moduleName: string, removeExtension?: boolean) => string;

Helps sanitize a module name if it is prefixed with '~/', '~' or '/'
Parameter moduleName
the name
Parameter removeExtension
whether to remove extension

function setInterval

setInterval: (
    callback: Function,
    milliseconds?: number,
    ...args: any[]
) => number;

Calls a function repeatedly with a delay between each call.
Parameter callback
The function to be called.
Parameter milliseconds
The delay between each function call.
Parameter args
One or more parameter to use once the function is called. Defaults to no parameters.

function setTimeout

setTimeout: (
    callback: Function,
    milliseconds?: number,
    ...args: any[]
) => number;

Calls a function after a specified delay.
Parameter callback
The function to be called.
Parameter milliseconds
The time to wait before the function is called. Defaults to 0.
Parameter args
One or more parameter to use once the function is called. Defaults to no parameters.

function throttle

throttle: <T extends Function = any>(fn: T, delay?: number) => T;

A simple throttle utility
Parameter fn
Function to throttle
Parameter delay
Customize the delay (default is 300ms)

function toUIString

toUIString: (object: any) => string;

Returns a string representation of an object to be shown in UI.
Parameter object
The object.

function verifyCallback

verifyCallback: (value: any) => void;

A function that checks if something is a valid function.
Parameter value
The value which will be checked. Throws exception if passed value is not a valid function.

class ClassInfo

class ClassInfo {}

A Class holding information about a class

property baseClassInfo

baseClassInfo: ClassInfo;

Gets the ClassInfo for the base class of the current info.

property name

name: string;

Gets the name of the class.

class ScopeError

class ScopeError extends Error {}

An Error class that provides additional context to an error.

constructor

constructor(child: Error, message?: string);

Creates a new ScopeError providing addtional context to the child error.
Parameter child
The child error to extend.
Parameter message
Additional message to prepend to the child error.

class Source

class Source {}

A class encapsulating information for source code origin.

constructor

constructor(uri: string, line: number, column: number);

Creates a new Source instance by given uri, line and column.

property column

column: number;

Gets the position in the source document.

property line

line: number;

Gets the line in the source document.

property uri

uri: string;

Gets the URI of the source document;

method get

static get: (object: any) => Source;

Get the source of an object.

method set

static set: (object: any, src: Source) => any;

Set the source of an object.

class SourceError

class SourceError extends ScopeError {}

Represents a scope error providing addiot

constructor

constructor(child: Error, source: Source, message?: string);

Creates a new SourceError by child error, source and optional message.
Parameter child
The child error to extend.
Parameter source
The source where the error occured.
Parameter message
Additonal message to prepend along the source location and the child error's message.

namespace Utils.layout

namespace Utils.layout {}

Utility module related to layout.

variable AT_MOST

const AT_MOST: number;

variable EXACTLY

const EXACTLY: number;

variable MEASURED_HEIGHT_STATE_SHIFT

const MEASURED_HEIGHT_STATE_SHIFT: number;

Bits that provide the actual measured size.

variable MEASURED_SIZE_MASK

const MEASURED_SIZE_MASK: number;

variable MEASURED_STATE_MASK

const MEASURED_STATE_MASK: number;

variable MEASURED_STATE_TOO_SMALL

const MEASURED_STATE_TOO_SMALL: number;

variable UNSPECIFIED

const UNSPECIFIED: number;

function getDisplayDensity

getDisplayDensity: () => number;

Gets display density for the current device.

function getMeasureSpecMode

getMeasureSpecMode: (spec: number) => number;

Gets measure specification mode from a given specification.
Parameter spec
The measure specification.

function getMeasureSpecSize

getMeasureSpecSize: (spec: number) => number;

Gets measure specification size from a given specification.
Parameter spec
The measure specification.

function getMode

getMode: (mode: number) => string;

Gets layout mode from a given specification as string.
Parameter mode
The measure specification mode.

function makeMeasureSpec

makeMeasureSpec: (px: number, mode: number) => number;

Creates measure specification size from size and mode.
Parameter size
The size component of measure specification.
Parameter mode
The mode component of measure specification.

function measureNativeView

measureNativeView: (
    nativeView: any,
    width: number,
    widthMode: number,
    height: number,
    heightMode: number
) => { width: number; height: number };

Converts device pixels to device independent pixes and measure the nativeView. Returns the desired size of the nativeView in device pixels.
Parameter nativeView
the nativeView to measure (UIView or android.view.View)
Parameter width
the available width
Parameter widthMode
width mode - UNSPECIFIED, EXACTLY or AT_MOST
Parameter height
the available hegiht
Parameter heightMode
height mode - UNSPECIFIED, EXACTLY or AT_MOST

function measureSpecToString

measureSpecToString: (measureSpec: number) => string;

Prints user friendly version of the measureSpec.
Parameter measureSpec
the spec to print

function round

round: (px: CoreTypes.px) => CoreTypes.px;

Rounds value used in layout.
Parameter px
to round.

function toDeviceIndependentPixels

toDeviceIndependentPixels: (value: CoreTypes.px) => CoreTypes.dip;

Convert device pixels to device independent pixels - px to dip.
Parameter value
The pixel to convert.

function toDevicePixels

toDevicePixels: (value: CoreTypes.dip) => CoreTypes.px;

Convert device independent pixels to device pixels - dip to px.
Parameter value
The pixel to convert.

Package Files (115)

Dependencies (7)

Dev Dependencies (0)

No dev dependencies.

Peer Dependencies (0)

No peer dependencies.

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@nativescript/core

Install

Overview

Index

Variables

Functions

Classes

Interfaces

Enums

Type Aliases

Namespaces

Variables

variable addCss

Deprecated

variable android

Deprecated

variable androidDynamicElevationOffsetProperty

variable androidElevationProperty

variable AnimationCurve

Deprecated

variable Application

variable autocapitalizationTypeProperty

variable autocorrectProperty

variable backgroundColorProperty

variable backgroundEvent

Deprecated

variable backgroundImageProperty

variable backgroundInternalProperty

variable backgroundPositionProperty

variable backgroundProperty

variable backgroundRepeatProperty

variable backgroundSizeProperty

variable borderBottomColorProperty

variable borderBottomLeftRadiusProperty

variable borderBottomRightRadiusProperty

variable borderBottomWidthProperty

variable borderColorProperty

variable borderLeftColorProperty

variable borderLeftWidthProperty

variable borderRadiusProperty

variable borderRightColorProperty

variable borderRightWidthProperty

variable borderTopColorProperty

variable borderTopLeftRadiusProperty

variable borderTopRightRadiusProperty

variable borderTopWidthProperty

variable borderWidthProperty

variable clipPathProperty

variable colorProperty

variable CSSHelper

variable Device

variable Dialogs

variable discardedErrorEvent

Deprecated

variable displayedEvent

Deprecated

variable editableProperty

variable Enums

Deprecated

variable exitEvent

Deprecated

variable fontFamilyProperty

variable fontInternalProperty

variable fontScaleChangedEvent

Deprecated

variable fontScaleInternalProperty

variable fontSizeProperty

variable fontStyleProperty

variable fontVariationSettingsProperty

variable fontWeightProperty

variable foregroundEvent

Deprecated

variable getCssFileName

Deprecated

variable getMainEntry

Deprecated

variable getNativeApplication

Deprecated

variable getResources

Deprecated