[6a3a178] | 1 | 'use strict';
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| 2 | var $ = require('../internals/export');
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| 3 | var IS_PURE = require('../internals/is-pure');
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| 4 | var NativePromise = require('../internals/native-promise-constructor');
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| 5 | var fails = require('../internals/fails');
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| 6 | var getBuiltIn = require('../internals/get-built-in');
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| 7 | var speciesConstructor = require('../internals/species-constructor');
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| 8 | var promiseResolve = require('../internals/promise-resolve');
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| 9 | var redefine = require('../internals/redefine');
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| 10 |
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| 11 | // Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829
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| 12 | var NON_GENERIC = !!NativePromise && fails(function () {
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| 13 | NativePromise.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });
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| 14 | });
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| 15 |
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| 16 | // `Promise.prototype.finally` method
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| 17 | // https://tc39.es/ecma262/#sec-promise.prototype.finally
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| 18 | $({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {
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| 19 | 'finally': function (onFinally) {
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| 20 | var C = speciesConstructor(this, getBuiltIn('Promise'));
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| 21 | var isFunction = typeof onFinally == 'function';
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| 22 | return this.then(
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| 23 | isFunction ? function (x) {
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| 24 | return promiseResolve(C, onFinally()).then(function () { return x; });
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| 25 | } : onFinally,
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| 26 | isFunction ? function (e) {
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| 27 | return promiseResolve(C, onFinally()).then(function () { throw e; });
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| 28 | } : onFinally
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| 29 | );
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| 30 | }
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| 31 | });
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| 32 |
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| 33 | // makes sure that native promise-based APIs `Promise#finally` properly works with patched `Promise#then`
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| 34 | if (!IS_PURE && typeof NativePromise == 'function') {
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| 35 | var method = getBuiltIn('Promise').prototype['finally'];
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| 36 | if (NativePromise.prototype['finally'] !== method) {
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| 37 | redefine(NativePromise.prototype, 'finally', method, { unsafe: true });
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| 38 | }
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| 39 | }
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