THE WORLD'S LARGEST WEB DEVELOPER SITE

JavaScript RegExp \b Metacharacter

❮ JavaScript RegExp Object

Example

Do a global search for "W3" at the beginning or end of a word in a string:

var str = "Visit W3Schools";
var patt1 = /\bW3/g;

The marked text below shows where the expression gets a match:

Visit W3Schools
Try it Yourself »

Definition and Usage

The \b metacharacter is used to find a match at the beginning or end of a word.

If no match is found, it returns null.


Browser Support

Expression
\b Yes Yes Yes Yes Yes

Syntax

new RegExp("\\bregexp")

or simply:

/\bregexp/

Syntax with modifiers

new RegExp("\\bregexp","g")

or simply:

/\bregexp/g

❮ JavaScript RegExp Object