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- 'use strict';
- var $ = require('../internals/export');
- var IS_PURE = require('../internals/is-pure');
- var FORCED_PROMISE_CONSTRUCTOR = require('../internals/promise-constructor-detection').CONSTRUCTOR;
- var NativePromiseConstructor = require('../internals/promise-native-constructor');
- var getBuiltIn = require('../internals/get-built-in');
- var isCallable = require('../internals/is-callable');
- var defineBuiltIn = require('../internals/define-built-in');
-
- var NativePromisePrototype = NativePromiseConstructor && NativePromiseConstructor.prototype;
-
- // `Promise.prototype.catch` method
- // https://tc39.es/ecma262/#sec-promise.prototype.catch
- $({ target: 'Promise', proto: true, forced: FORCED_PROMISE_CONSTRUCTOR, real: true }, {
- 'catch': function (onRejected) {
- return this.then(undefined, onRejected);
- }
- });
-
- // makes sure that native promise-based APIs `Promise#catch` properly works with patched `Promise#then`
- if (!IS_PURE && isCallable(NativePromiseConstructor)) {
- var method = getBuiltIn('Promise').prototype['catch'];
- if (NativePromisePrototype['catch'] !== method) {
- defineBuiltIn(NativePromisePrototype, 'catch', method, { unsafe: true });
- }
- }
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