@stdlib/assert-is-boolean
Advanced tools
@stdlib/assert-is-boolean is a utility package that provides functions to check if a value is a boolean primitive or a boolean object.
Check if a value is a boolean primitive
This feature allows you to check if a given value is a boolean primitive. It returns true for boolean primitives and false for other types.
const isBoolean = require('@stdlib/assert-is-boolean').isPrimitive;
console.log(isBoolean(true)); // => true
console.log(isBoolean(false)); // => true
console.log(isBoolean('true')); // => falseCheck if a value is a boolean object
This feature allows you to check if a given value is a boolean object. It returns true for boolean objects and false for other types.
const isBooleanObject = require('@stdlib/assert-is-boolean').isObject;
console.log(isBooleanObject(new Boolean(true))); // => true
console.log(isBooleanObject(true)); // => falseCheck if a value is either a boolean primitive or a boolean object
This feature allows you to check if a given value is either a boolean primitive or a boolean object. It returns true for both boolean primitives and objects, and false for other types.
const isBoolean = require('@stdlib/assert-is-boolean');
console.log(isBoolean(true)); // => true
console.log(isBoolean(new Boolean(false))); // => true
console.log(isBoolean('false')); // => falseThe 'is-boolean-object' package provides a function to check if a value is a boolean object. Unlike @stdlib/assert-is-boolean, it does not check for boolean primitives.
The 'lodash.isboolean' package is part of the Lodash library and provides a function to check if a value is a boolean primitive. It does not check for boolean objects, making it less comprehensive compared to @stdlib/assert-is-boolean.
The 'is-boolean' package provides a function to check if a value is a boolean primitive. It is similar to the primitive check in @stdlib/assert-is-boolean but does not include checks for boolean objects.
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Test if a value is a boolean.
npm install @stdlib/assert-is-boolean
var isBoolean = require( '@stdlib/assert-is-boolean' );
Tests if a value is a boolean.
var Boolean = require( '@stdlib/boolean-ctor' );
var bool = isBoolean( false );
// returns true
bool = isBoolean( true );
// returns true
bool = isBoolean( new Boolean( false ) );
// returns true
bool = isBoolean( new Boolean( true ) );
// returns true
Tests if a value is a primitive boolean.
var Boolean = require( '@stdlib/boolean-ctor' );
var bool = isBoolean.isPrimitive( true );
// returns true
bool = isBoolean.isPrimitive( false );
// returns true
bool = isBoolean.isPrimitive( new Boolean( true ) );
// returns false
Tests if a value is a Boolean object.
var Boolean = require( '@stdlib/boolean-ctor' );
var bool = isBoolean.isObject( true );
// returns false
bool = isBoolean.isObject( new Boolean( false ) );
// returns true
var Boolean = require( '@stdlib/boolean-ctor' );
var isBoolean = require( '@stdlib/assert-is-boolean' );
var bool = isBoolean( false );
// returns true
bool = isBoolean( new Boolean( false ) );
// returns true
bool = isBoolean( 'true' );
// returns false
bool = isBoolean( null );
// returns false
This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
See LICENSE.
Copyright © 2016-2024. The Stdlib Authors.
0.2.2 (2024-07-27)
<section class="commits">a8676e3 - bench: update assert/is-boolean benchmarks to measure affirmative/negative test values (#1458) (by Snehil Shah)A total of 1 person contributed to this release. Thank you to this contributor:
FAQs
Test if a value is a boolean.
The npm package @stdlib/assert-is-boolean receives a total of 408,053 weekly downloads. As such, @stdlib/assert-is-boolean popularity was classified as popular.
We found that @stdlib/assert-is-boolean demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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