react-native/Libraries/Core/polyfillES6Collections.js
Emily Janzer df2eaa9eb6 Modularize InitializeCore
Summary: Split up InitializeCore into a bunch of modules. The idea here is to make it easier for apps to just get the initialization logic they want and leave behind what they don't; for example, if you don't want the Map/Set polyfills, instead of requiring InitializeCore you can require the modules you want from it.

Reviewed By: yungsters

Differential Revision: D10842564

fbshipit-source-id: 3b12d54fddea8c4ee75886022338c214987a015c
2018-10-28 15:45:14 -07:00

26 lines
741 B
JavaScript

/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @flow strict-local
* @format
*/
'use strict';
const {polyfillGlobal} = require('PolyfillFunctions');
/**
* Polyfill ES6 collections (Map and Set).
* If you don't need these polyfills, don't use InitializeCore; just directly
* require the modules you need from InitializeCore for setup.
*/
const _shouldPolyfillCollection = require('_shouldPolyfillES6Collection');
if (_shouldPolyfillCollection('Map')) {
polyfillGlobal('Map', () => require('Map'));
}
if (_shouldPolyfillCollection('Set')) {
polyfillGlobal('Set', () => require('Set'));
}