main.js (1009B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 // MAIN // 22 23 /** 24 * Tests for native `Symbol` support. 25 * 26 * @returns {boolean} boolean indicating if an environment has `Symbol` support 27 * 28 * @example 29 * var bool = hasSymbolSupport(); 30 * // returns <boolean> 31 */ 32 function hasSymbolSupport() { 33 return ( 34 typeof Symbol === 'function' && 35 typeof Symbol( 'foo' ) === 'symbol' 36 ); 37 } 38 39 40 // EXPORTS // 41 42 module.exports = hasSymbolSupport;