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32 lines
1.2 KiB
JavaScript
32 lines
1.2 KiB
JavaScript
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/**
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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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