Observable | API - NativeScript

Observable

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Summary

Constructors

constructor

new Observable(): Observable

defined in @nativescript/core/data/observable/index.d.ts:76:1

Returns Observable

Properties

_isViewBase

Private

_isViewBase: boolean

defined in @nativescript/core/data/observable/index.d.ts:179:8

propertyChangeEvent

Static

propertyChangeEvent: string

defined in @nativescript/core/data/observable/index.d.ts:81:8

Methods

_createPropertyChangeData

_createPropertyChangeData(name: string, value: any, oldValue?: any): PropertyChangeData

defined in @nativescript/core/data/observable/index.d.ts:172:1

Parameter	Default	Description
`name`		`string`
`value`		`any`
`oldValue`		`any`

Returns PropertyChangeData

_emit

_emit(eventNames: string): any

defined in @nativescript/core/data/observable/index.d.ts:167:1

Parameter	Default	Description
`eventNames`		`string`

Returns any

addEventListener

addEventListener(eventNames: string, callback: (data: EventData) => void, thisArg?: any): any

defined in @nativescript/core/data/observable/index.d.ts:121:1

Parameter	Default	Description
`eventNames`		`string`
`callback`		`(data: EventData) => void`
`thisArg`		`any`

Returns any

get

get(name: string): any

defined in @nativescript/core/data/observable/index.d.ts:148:1

Parameter	Default	Description
`name`		`string`

Returns any

hasListeners

hasListeners(eventName: string): boolean

defined in @nativescript/core/data/observable/index.d.ts:165:1

Parameter	Default	Description
`eventName`		`string`

Returns boolean

notify

notify<T>(data: T): void

defined in @nativescript/core/data/observable/index.d.ts:154:1

Parameter	Default	Description
`data`		`T`

Returns void

notifyPropertyChange

notifyPropertyChange(propertyName: string, value: any, oldValue?: any): void

defined in @nativescript/core/data/observable/index.d.ts:159:1

Parameter	Default	Description
`propertyName`		`string`
`value`		`any`
`oldValue`		`any`

Returns void

off

off(eventNames: string, callback?: any, thisArg?: any): any

defined in @nativescript/core/data/observable/index.d.ts:111:1

Parameter	Default	Description
`eventNames`		`string`
`callback`		`any`
`thisArg`		`any`

Returns any

on

on(eventNames: string, callback: (data: EventData) => void, thisArg?: any): any

defined in @nativescript/core/data/observable/index.d.ts:89:1

Parameter	Default	Description
`eventNames`		`string`
`callback`		`(data: EventData) => void`
`thisArg`		`any`

Returns any

on(event: "propertyChange", callback: (data: EventData) => void, thisArg?: any): any

defined in @nativescript/core/data/observable/index.d.ts:96:1

Parameter	Default	Description
`event`		`"propertyChange"`
`callback`		`(data: EventData) => void`
`thisArg`		`any`

Returns any

once

once(event: string, callback: (data: EventData) => void, thisArg?: any): any

defined in @nativescript/core/data/observable/index.d.ts:104:1

Parameter	Default	Description
`event`		`string`
`callback`		`(data: EventData) => void`
`thisArg`		`any`

Returns any

removeEventListener

removeEventListener(eventNames: string, callback?: any, thisArg?: any): any

defined in @nativescript/core/data/observable/index.d.ts:131:1

Parameter	Default	Description
`eventNames`		`string`
`callback`		`any`
`thisArg`		`any`

Returns any

set

set(name: string, value: any): void

defined in @nativescript/core/data/observable/index.d.ts:138:1

Parameter	Default	Description
`name`		`string`
`value`		`any`

Returns void

setProperty

setProperty(name: string, value: any): void

defined in @nativescript/core/data/observable/index.d.ts:143:1

Parameter	Default	Description
`name`		`string`
`value`		`any`

Returns void

addEventListener

Static

addEventListener(eventName: string, callback: any, thisArg?: any): void

defined in @nativescript/core/data/observable/index.d.ts:123:1

Parameter	Default	Description
`eventName`		`string`
`callback`		`any`
`thisArg`		`any`

Returns void

off

Static

off(eventName: string, callback?: any, thisArg?: any): void

defined in @nativescript/core/data/observable/index.d.ts:113:1

Parameter	Default	Description
`eventName`		`string`
`callback`		`any`
`thisArg`		`any`

Returns void

on

Static

on(eventName: string, callback: any, thisArg?: any): void

defined in @nativescript/core/data/observable/index.d.ts:91:1

Parameter	Default	Description
`eventName`		`string`
`callback`		`any`
`thisArg`		`any`

Returns void

once

Static

once(eventName: string, callback: any, thisArg?: any): void

defined in @nativescript/core/data/observable/index.d.ts:106:1

Parameter	Default	Description
`eventName`		`string`
`callback`		`any`
`thisArg`		`any`

Returns void

removeEventListener

Static

removeEventListener(eventName: string, callback?: any, thisArg?: any): void

defined in @nativescript/core/data/observable/index.d.ts:133:1

Parameter	Default	Description
`eventName`		`string`
`callback`		`any`
`thisArg`		`any`

Returns void

Summary #

Constructors

Properties

Methods

Constructors #

constructor #

Properties #

_isViewBase #

propertyChangeEvent #

Methods #

_createPropertyChangeData #

_emit #

addEventListener #

get #

hasListeners #

notify #

notifyPropertyChange #

off #

on #

once #

removeEventListener #

set #

setProperty #

addEventListener #

off #

on #

once #

removeEventListener #

Summary

Constructors

constructor

Properties

_isViewBase

propertyChangeEvent

Methods

_createPropertyChangeData

_emit

addEventListener

get

hasListeners

notify

notifyPropertyChange

off

on

once

removeEventListener

set

setProperty

addEventListener

off

on

once

removeEventListener