@stdlib/regexp-color-hexadecimal NPM

reColorHexadecimal

Regular expression to match a hexadecimal color.

Installation

npm install @stdlib/regexp-color-hexadecimal

Usage

var reColorHexadecimal = require( '@stdlib/regexp-color-hexadecimal' );

reColorHexadecimal( [mode] )

Returns a regular expression to match a full hexadecimal color.

var RE = reColorHexadecimal();
// returns <RegExp>

var bool = RE.test( 'ffffff' );
// returns true

bool = RE.test( '000' );
// returns false

To return a regular expression that matches a shorthand hexadecimal color, set the mode argument to shorthand.

var RE = reColorHexadecimal( 'shorthand' );
// returns <RegExp>

var bool = RE.test( '000' );
// returns true

To return a regular expression that matches either a shorthand or a full length hexadecimal color, set the mode argument to either.

var RE = reColorHexadecimal( 'either' );
// returns <RegExp>

var bool = RE.test( '000' );
// returns true

reColorHexadecimal.REGEXP

Regular expression to match a full length hexadecimal color.

var bool = reColorHexadecimal.REGEXP.test( 'ffffff' );
// returns true

bool = reColorHexadecimal.REGEXP.test( '000' );
// returns false

reColorHexadecimal.REGEXP_SHORTHAND

Regular expression to match a shorthand hexadecimal color.

var bool = reColorHexadecimal.REGEXP_SHORTHAND.test( 'ffffff' );
// returns false

bool = reColorHexadecimal.REGEXP_SHORTHAND.test( '000' );
// returns true

reColorHexadecimal.REGEXP_EITHER

Regular expression to match either a shorthand or a full length hexadecimal color.

var bool = reColorHexadecimal.REGEXP_EITHER.test( 'ffffff' );
// returns true

bool = reColorHexadecimal.REGEXP_EITHER.test( '000' );
// returns true

Examples

var isString = require( '@stdlib/assert-is-string' ).isPrimitive;
var reColorHexadecimal = require( '@stdlib/regexp-color-hexadecimal' );

function isHexColor( value, mode ) {
    if ( !isString( value ) ) {
        return false;
    }
    if ( mode === 'shorthand' ) {
        return reColorHexadecimal.REGEXP_SHORTHAND.test( value );
    }
    if ( mode === 'either' ) {
        return reColorHexadecimal.REGEXP_EITHER.test( value );
    }
    return reColorHexadecimal.REGEXP.test( value );
}

var bool = isHexColor( 'ffffff', 'full' );
// returns true

bool = isHexColor( '474747', 'either' );
// returns true

bool = isHexColor( '0A5BBE', 'shorthand' );
// returns false

bool = isHexColor( '000', 'full' );
// returns false

bool = isHexColor( '000', 'either' );
// returns true

bool = isHexColor( 'F7b', 'shorthand' );
// returns true

bool = isHexColor( 'abcd', 'either' );
// returns false

bool = isHexColor( '', 'either' );
// returns false

bool = isHexColor( null, 'either' );
// 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.