What is @stdlib/assert-is-boolean?
@stdlib/assert-is-boolean is a utility package that provides functions to check if a value is a boolean primitive or a boolean object.
What are @stdlib/assert-is-boolean's main functionalities?
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')); // => false
Check 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)); // => false
Check 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')); // => false
Other packages similar to @stdlib/assert-is-boolean
is-boolean-object
The '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.
lodash.isboolean
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.
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.
isBoolean
Test if a value is a boolean.
Installation
npm install @stdlib/assert-is-boolean
Usage
var isBoolean = require( '@stdlib/assert-is-boolean' );
isBoolean( value )
Tests if a value
is a boolean
.
var bool = isBoolean( false );
bool = isBoolean( true );
bool = isBoolean( new Boolean( false ) );
bool = isBoolean( new Boolean( true ) );
isBoolean.isPrimitive( value )
Tests if a value
is a primitive boolean
.
var bool = isBoolean.isPrimitive( true );
bool = isBoolean.isPrimitive( false );
bool = isBoolean.isPrimitive( new Boolean( true ) );
isBoolean.isObject( value )
Tests if a value
is a Boolean
object.
var bool = isBoolean.isObject( true );
bool = isBoolean.isObject( new Boolean( false ) );
Examples
var isBoolean = require( '@stdlib/assert-is-boolean' );
var bool = isBoolean( false );
bool = isBoolean( new Boolean( false ) );
bool = isBoolean( 'true' );
bool = isBoolean( null );
Notice
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.
License
See LICENSE.
Copyright
Copyright © 2016-2021. The Stdlib Authors.
0.0.6 (2021-07-09)
No changes reported for this release.
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