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31 lines
1.2 KiB
31 lines
1.2 KiB
/** |
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* Copyright (c) 2015-present, Facebook, Inc. |
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* |
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* This source code is licensed under the MIT license found in the |
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* LICENSE file in the root directory of this source tree. |
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*/ |
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'use strict'; |
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if (typeof Promise === 'undefined') { |
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// Rejection tracking prevents a common issue where React gets into an |
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// inconsistent state due to an error, but it gets swallowed by a Promise, |
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// and the user has no idea what causes React's erratic future behavior. |
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require('promise/lib/rejection-tracking').enable(); |
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self.Promise = require('promise/lib/es6-extensions.js'); |
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} |
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// Make sure we're in a Browser-like environment before importing polyfills |
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// This prevents `fetch()` from being imported in a Node test environment |
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if (typeof window !== 'undefined') { |
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// fetch() polyfill for making API calls. |
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require('whatwg-fetch'); |
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} |
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// Object.assign() is commonly used with React. |
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// It will use the native implementation if it's present and isn't buggy. |
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Object.assign = require('object-assign'); |
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// Support for...of (a commonly used syntax feature that requires Symbols) |
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require('core-js/features/symbol'); |
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// Support iterable spread (...Set, ...Map) |
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require('core-js/features/array/from');
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