main.js (970B)
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 /** 22 * Tests if a value is `null`. 23 * 24 * @param {*} value - value to test 25 * @returns {boolean} boolean indicating whether value is null 26 * 27 * @example 28 * var bool = isNull( null ); 29 * // returns true 30 * 31 * bool = isNull( true ); 32 * // returns false 33 */ 34 function isNull( value ) { 35 return value === null; 36 } 37 38 39 // EXPORTS // 40 41 module.exports = isNull;