JavaScript RegExp \W Metacharacter

The RegExp \W Metacharacter in JavaScript is used to find the nonword character i.e. characters which are not from a to z, A to Z, 0 to 9. It is the same as [^a-zA-Z0-9]. 

Syntax: 

/\W/ 

or

new RegExp("\\W")

Syntax with modifiers:

/\W/g 

or

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

Example 1: This example searches the non words characters. 

Javascript

function geek() {
    let str1 = "GeeksforGeeks@_123_$";
    let regex4 = /\W/g;
    let match4 = str1.match(regex4);

    console.log("Found " + match4.length
        + " matches: " + match4);
}
geek()

Output

Found 2 matches: @,$

Example 2: This example searches the non-word characters in the whole string. 

Javascript

function geek() {
    let str1 = "Geeky@128";
    let regex4 = new RegExp("\\W", "g");
    let match4 = str1.match(regex4);

    console.log("Found " + match4.length
        + " matches: " + match4);
}
geek()

Output

Found 1 matches: @

Supported Browsers: The browsers supported by RegExp \W Metacharacter are listed below:

• Google Chrome
• Apple Safari
• Mozilla Firefox
• Opera
• Internet Explorer

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.