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Properti Promise.prototype mewakili prototype untuk kostruktor Promise.

Property attributes of Promise.prototype
Writable no
Enumerable no
Configurable no

Deskripsi

Instansi Promise diwariskan dari Promise.prototype. Anda bisa menggunakan objek prototype pada constructor untuk menambahkan properti atau method ke semua instansi Promise.

Properti

Promise.prototype.constructor
Mengembalikan fungsi yang membuat instansi prototype. Ini adalah fungsi Promise secara default.

Method

Promise.prototype.catch(onRejected)
Appends a rejection handler callback to the promise, and returns a new promise resolving to the return value of the callback if it is called, or to its original fulfillment value if the promise is instead fulfilled.
Promise.prototype.then(onFulfilled, onRejected)
Appends fulfillment and rejection handlers to the promise, and returns a new promise resolving to the return value of the called handler, or to its original settled value if the promise was not handled (i.e. if the relevant handler onFulfilled or onRejected is undefined).

Specifications

Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Promise.prototype' in that specification.
Standard Initial definition.
ECMAScript Latest Draft (ECMA-262)
The definition of 'Promise.prototype' in that specification.
Draft  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support32 Yes29 No198
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support4.4.432 Yes29 Yes8 Yes

 

See also

Tag Dokumen dan Kontributor

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Kontributor untuk laman ini: fscholz, bekti
Terakhir diperbarui oleh: fscholz,