Return a regular expression to match a white space character.
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[Regular expression][regexp] to match a [white space][whitespace] character.
bash
npm install @stdlib/regexp-whitespacescript tag without installation and bundlers, use the [ES Module][es-module] available on the [esm][esm-url] branch (see [README][esm-readme]).deno][deno-url] branch (see [README][deno-readme] for usage intructions).umd][umd-url] branch (see [README][umd-readme]).javascript
var reWhitespace = require( '@stdlib/regexp-whitespace' );javascript
var RE_WHITESPACE = reWhitespace();
var bool = RE_WHITESPACE.test( '\n' );
// returns true
bool = RE_WHITESPACE.test( ' ' );
// returns trueoptions object with optional properties:string specifying regular expression [flags][mdn-regexp-flags]. Default: ''.boolean indicating whether to create a capture group for the match. Default: false.flags option with a list of flags (which may be in any order).javascript
var RE_WHITESPACE = reWhitespace({
'flags': 'gm'
});
var str = 'Hello World!';
var bool = RE_WHITESPACE.test( str );
// returns true
bool = RE_WHITESPACE.test( str );
// returns falsecapture option.javascript
var RE_WHITESPACE = reWhitespace({
'capture': true
});
var str = 'Hello World!';
var arr = str.split( RE_WHITESPACE );
// returns [ 'Hello', ' ', 'World!' ]javascript
var bool = reWhitespace.REGEXP.test( '\n' );
// returns true
bool = reWhitespace.REGEXP.test( '\\n' );
// returns falsejavascript
var replace = require( '@stdlib/string-replace' );
var str = 'Duplicate capture';
var out = replace( str, reWhitespace.REGEXP_CAPTURE, '$1$1' );
// returns 'Duplicate capture'25 characters defined as white space (“WSpace=Y”,”WS”) characters in the Unicode 9.0 character database.REGEXP regular expression is defined astext
/[\u0009\u000A\u000B\u000C\u000D\u0020\u0085\u00A0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u2028\u2029\u202F\u205F\u3000\uFEFF]/REGEXP_CAPTURE regular expression is defined astext
/([\u0009\u000A\u000B\u000C\u000D\u0020\u0085\u00A0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u2028\u2029\u202F\u205F\u3000\uFEFF])/javascript
var reWhitespace = require( '@stdlib/regexp-whitespace' );
var RE_WHITESPACE = reWhitespace();
var bool = RE_WHITESPACE.test( 'beep boop' );
// returns true
bool = RE_WHITESPACE.test( '\n' );
// returns true
bool = RE_WHITESPACE.test( '\r' );
// returns true
bool = RE_WHITESPACE.test( '\t' );
// returns true
bool = RE_WHITESPACE.test( 'beep' );
// returns false
var str = 'This is\na newline\r\ndelimited string.';
var arr = str.split( RE_WHITESPACE );
// returns [ 'This', 'is', 'a', 'newline', '', 'delimited', 'string.' ]
