@stdlib/assert-is-null

isNull

Test if a value is null.

Installation

npm install @stdlib/assert-is-null

Usage

var isNull = require( '@stdlib/assert-is-null' );

isNull( value )

Tests if a value is null.

var bool = isNull( null );
// returns true

Examples

var isNull = require( '@stdlib/assert-is-null' );

var bool = isNull( null );
// returns true

bool = isNull( 'beep' );
// returns false

bool = isNull( 5 );
// returns false

bool = isNull( void 0 );
// returns false

bool = isNull( true );
// returns false

bool = isNull( {} );
// returns false

bool = isNull( [] );
// returns false

bool = isNull( function foo() {} );
// returns false

See Also

• @stdlib/assert/is-undefined: test if a value is undefined.
• @stdlib/assert/is-undefined-or-null: test if a value is undefined or 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.

Community

License

See LICENSE.

Copyright

Copyright © 2016-2022. The Stdlib Authors.