20 lines
763 B
JavaScript
20 lines
763 B
JavaScript
// https://github.com/tc39/proposal-promise-finally
|
|
'use strict';
|
|
var $export = require('./_export');
|
|
var core = require('./_core');
|
|
var global = require('./_global');
|
|
var speciesConstructor = require('./_species-constructor');
|
|
var promiseResolve = require('./_promise-resolve');
|
|
|
|
$export($export.P + $export.R, 'Promise', { 'finally': function (onFinally) {
|
|
var C = speciesConstructor(this, core.Promise || global.Promise);
|
|
var isFunction = typeof onFinally == 'function';
|
|
return this.then(
|
|
isFunction ? function (x) {
|
|
return promiseResolve(C, onFinally()).then(function () { return x; });
|
|
} : onFinally,
|
|
isFunction ? function (e) {
|
|
return promiseResolve(C, onFinally()).then(function () { throw e; });
|
|
} : onFinally
|
|
);
|
|
} });
|