31 lines
1.2 KiB
JavaScript
31 lines
1.2 KiB
JavaScript
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'use strict';
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var $ = require('../internals/export');
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var IS_PURE = require('../internals/is-pure');
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var NativePromise = require('../internals/native-promise-constructor');
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var getBuiltIn = require('../internals/get-built-in');
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var speciesConstructor = require('../internals/species-constructor');
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var promiseResolve = require('../internals/promise-resolve');
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var redefine = require('../internals/redefine');
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// `Promise.prototype.finally` method
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// https://tc39.github.io/ecma262/#sec-promise.prototype.finally
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$({ target: 'Promise', proto: true, real: true }, {
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'finally': function (onFinally) {
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var C = speciesConstructor(this, getBuiltIn('Promise'));
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var isFunction = typeof onFinally == 'function';
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return this.then(
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isFunction ? function (x) {
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return promiseResolve(C, onFinally()).then(function () { return x; });
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} : onFinally,
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isFunction ? function (e) {
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return promiseResolve(C, onFinally()).then(function () { throw e; });
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} : onFinally
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);
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}
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});
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// patch native Promise.prototype for native async functions
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if (!IS_PURE && typeof NativePromise == 'function' && !NativePromise.prototype['finally']) {
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redefine(NativePromise.prototype, 'finally', getBuiltIn('Promise').prototype['finally']);
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}
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