main.js (1326B)
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 // MODULES // 22 23 var evil = require( '@stdlib/utils/eval' ); 24 25 26 // MAIN // 27 28 /** 29 * Tests for native `async/await` support. 30 * 31 * @returns {boolean} boolean indicating if an environment has native `async`/`await` support 32 * 33 * @example 34 * var bool = hasAsyncAwaitSupport(); 35 * if ( bool ) { 36 * console.log( 'Environment has native async/await support.' ); 37 * } else { 38 * console.log( 'Environment lacks native async/await support.' ); 39 * } 40 */ 41 function hasAsyncAwaitSupport() { 42 var bool; 43 try { 44 evil( '"use strict"; async () => {}' ); 45 bool = true; 46 } catch ( err ) { // eslint-disable-line no-unused-vars 47 bool = false; 48 } 49 return bool; 50 } 51 52 53 // EXPORTS // 54 55 module.exports = hasAsyncAwaitSupport;