JavaScript RegExp \b Metacharacter

RegExp Object Reference 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

Internet Explorer Firefox Opera Google Chrome Safari

The \b metacharacter is supported in all major browsers.


Syntax

new RegExp("\\bregexp")

or simply:

/\bregexp/

Syntax with modifiers

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

or simply:

/\bregexp/g

RegExp Object Reference JavaScript RegExp Object

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