@stdlib/assert-is-function

Test if a value is a function.

Usage no npm install needed!

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README

isFunction

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Test if a value is a function.

Installation

npm install @stdlib/assert-is-function

Usage

var isFunction = require( '@stdlib/assert-is-function' );

isFunction( value )

Tests if a value is a function.

function beep() {
    console.log( 'beep' );
}

var bool = isFunction( beep );
// returns true

Examples

var isFunction = require( '@stdlib/assert-is-function' );

var bool = isFunction( function foo() {} );
// returns true

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

bool = isFunction( 5 );
// returns false

bool = isFunction( true );
// returns false

bool = isFunction( null );
// returns false

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

bool = isFunction( {} );
// 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.