@stdlib/assert-is-boolean

Test if a value is a boolean.

Usage no npm install needed!

<script type="module">
  import stdlibAssertIsBoolean from 'https://cdn.skypack.dev/@stdlib/assert-is-boolean';
</script>

README

isBoolean

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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 );
// returns true

bool = isBoolean( true );
// returns true

bool = isBoolean( new Boolean( false ) );
// returns true

bool = isBoolean( new Boolean( true ) );
// returns true

isBoolean.isPrimitive( value )

Tests if a value is a primitive boolean.

var bool = isBoolean.isPrimitive( true );
// returns true

bool = isBoolean.isPrimitive( false );
// returns true

bool = isBoolean.isPrimitive( new Boolean( true ) );
// returns false

isBoolean.isObject( value )

Tests if a value is a Boolean object.

var bool = isBoolean.isObject( true );
// returns false

bool = isBoolean.isObject( new Boolean( false ) );
// returns true

Examples

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

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.

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License

See LICENSE.

Copyright

Copyright © 2016-2021. The Stdlib Authors.