main.js (1549B)
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 objectKeys = require( '@stdlib/utils/keys' ); 24 var isPlainObject = require( './../../is-plain-object' ); 25 var hasSymbolSupport = require( './../../has-symbol-support' ); 26 27 28 // VARIABLES // 29 30 var FLG = hasSymbolSupport(); 31 32 33 // MAIN // 34 35 /** 36 * Tests if a value is an empty object. 37 * 38 * @param {*} value - value to test 39 * @returns {boolean} boolean indicating whether value is an empty object 40 * 41 * @example 42 * var bool = isEmptyObject( {} ); 43 * // returns true 44 * 45 * @example 46 * var bool = isEmptyObject( { 'beep': 'boop' } ); 47 * // returns false 48 * 49 * @example 50 * var bool = isEmptyObject( [] ); 51 * // returns false 52 */ 53 function isEmptyObject( value ) { 54 if ( !isPlainObject( value ) ) { 55 return false; 56 } 57 if ( objectKeys( value ).length > 0 ) { 58 return false; 59 } 60 if ( FLG && Object.getOwnPropertySymbols( value ).length > 0 ) { 61 return false; 62 } 63 return true; 64 } 65 66 67 // EXPORTS // 68 69 module.exports = isEmptyObject;