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isEmptyString

Test if a value is an empty string.

Installation

npm install @stdlib/assert-is-empty-string

Alternatively,

• To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
• If you are using Deno, visit the deno branch (see README for usage intructions).
• For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).

The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.

To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

Usage

var isEmptyString = require( '@stdlib/assert-is-empty-string' );

isEmptyString( value )

Tests if a value is an empty string.

var bool = isEmptyString( '' );
// returns true

bool = isEmptyString( new String( '' ) );
// returns true

isEmptyString.isPrimitive( value )

Tests if a value is an empty primitive string.

var bool = isEmptyString.isPrimitive( '' );
// returns true

bool = isEmptyString.isPrimitive( new String( '' ) );
// returns false

isEmptyString.isObject( value )

Tests if a value is an empty String object.

var bool = isEmptyString.isObject( '' );
// returns false

bool = isEmptyString.isObject( new String( '' ) );
// returns true

Examples

var isEmptyString = require( '@stdlib/assert-is-empty-string' );

var bool = isEmptyString( '' );
// returns true

bool = isEmptyString( new String( '' ) );
// returns true

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

bool = isEmptyString( 0 );
// returns false

bool = isEmptyString( null );
// returns false

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

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

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

bool = isEmptyString( function empty() {} );
// returns false

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See Also

• @stdlib/assert-is-string: test if a value is a string.

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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

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.