README.md (2002B)
1 <!-- 2 3 @license Apache-2.0 4 5 Copyright (c) 2018 The Stdlib Authors. 6 7 Licensed under the Apache License, Version 2.0 (the "License"); 8 you may not use this file except in compliance with the License. 9 You may obtain a copy of the License at 10 11 http://www.apache.org/licenses/LICENSE-2.0 12 13 Unless required by applicable law or agreed to in writing, software 14 distributed under the License is distributed on an "AS IS" BASIS, 15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 See the License for the specific language governing permissions and 17 limitations under the License. 18 19 --> 20 21 # isFalsy 22 23 > Test if a value is falsy. 24 25 <section class="usage"> 26 27 ## Usage 28 29 ```javascript 30 var isFalsy = require( '@stdlib/assert/is-falsy' ); 31 ``` 32 33 #### isFalsy( value ) 34 35 Tests if a `value` is a value which translates to `false` when evaluated in a boolean context. 36 37 ```javascript 38 var bool = isFalsy( false ); 39 // returns true 40 41 bool = isFalsy( '' ); 42 // returns true 43 44 bool = isFalsy( 0 ); 45 // returns true 46 47 bool = isFalsy( NaN ); 48 // returns true 49 50 bool = isFalsy( null ); 51 // returns true 52 53 bool = isFalsy( void 0 ); 54 // returns true 55 56 bool = isFalsy( [] ); 57 // returns false 58 ``` 59 60 </section> 61 62 <!-- /.usage --> 63 64 <section class="examples"> 65 66 ## Examples 67 68 <!-- eslint-disable no-empty-function, no-restricted-syntax --> 69 70 <!-- eslint no-undef: "error" --> 71 72 ```javascript 73 var isFalsy = require( '@stdlib/assert/is-falsy' ); 74 75 var bool = isFalsy( false ); 76 // returns true 77 78 bool = isFalsy( 0 ); 79 // returns true 80 81 bool = isFalsy( NaN ); 82 // returns true 83 84 bool = isFalsy( '' ); 85 // returns true 86 87 bool = isFalsy( void 0 ); 88 // returns true 89 90 bool = isFalsy( null ); 91 // returns true 92 93 bool = isFalsy( 'beep' ); 94 // returns false 95 96 bool = isFalsy( 5 ); 97 // returns false 98 99 bool = isFalsy( true ); 100 // returns false 101 102 bool = isFalsy( [] ); 103 // returns false 104 105 bool = isFalsy( {} ); 106 // returns false 107 108 bool = isFalsy( function foo() {} ); 109 // returns false 110 ``` 111 112 </section> 113 114 <!-- /.examples --> 115 116 <section class="links"> 117 118 </section> 119 120 <!-- /.links -->