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36 lines
1.5 KiB
36 lines
1.5 KiB
'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 fails = require('../internals/fails'); |
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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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// Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829 |
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var NON_GENERIC = !!NativePromise && fails(function () { |
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NativePromise.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ }); |
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}); |
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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, forced: NON_GENERIC }, { |
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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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