The RegExp \B Metacharacter in JavaScript is used to find a match that is not present at the beginning or end of a word. If a match is found it returns the word else it returns NULL.
Syntax:
/\B/
or
new RegExp("\\B")
Syntax with modifiers:
/\B/g
or
new RegExp("\\B", "g")
Example 1: This example matches the word “for” which is not present at the beginning or end of the word.
Javascript
function geek() { let str1 = "neveropen@_123_$"; let regex4 = /\Bfor/gi; let match4 = str1.match(regex4); console.log("Found " + match4.length + " match: " + match4);}geek(); |
Found 1 match: for
Example 2: This example matches the word “Geeky” and replaces it with “GEEKY”.
Javascript
function geek() { let str1 = "123geeky456"; let regex4 = new RegExp("\\Bgeeky", "gi"); let replace = "GEEKY"; let match4 = str1.replace(regex4, replace); console.log(" New string: " + match4);}geek(); |
New string: 123GEEKY456
Supported Browsers: The browsers supported by RegExp \B Metacharacter are listed below:
- Chrome
- Safari
- Firefox
- Opera
- Edge
We have a complete list of Javascript RegExp expressions, to check those please go through this JavaScript RegExp Complete Reference article.
We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.
