JavaScript RegExp \s Metacharacter

The RegExp \s Metacharacter in JavaScript is used to find the whitespace characters. The whitespace character can be a space/tab/new line/vertical character. It is the same as [ \t\n\r].

Syntax:

/\s/ 

or 

new RegExp("\\s")

Syntax with modifiers:

/\s/g 

or 

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

Example 1: This example replaces the white spaces with a dash.

Javascript

function geek() {
    let regex = /\s/g;
    let replace = "-";
    let str = "GeeksforGeeks is the computer "
        + "science\nportal\tfor geeks.";
    let str1 = str.replace(regex, replace);
    console.log("The new string is: \n" + str1);
}
geek()

Output

The new string is: 
GeeksforGeeks-is-the-computer-science-portal-for-geeks.

Example 2: This example replaces all the white spaces with hash(#).

Javascript

function geek() {
    let regex = new RegExp("\\s", "g");
    let replace = "#";
    let str = "Geeks Classes is a Classroom "
        + "programme\nby GeeksforGeeks\tto"
        + " enhance DSA";
    let str1 = str.replace(regex, replace);
    console.log("The new string is: \n" + str1);
}
geek()

Output

The new string is: 
Geeks#Classes#is#a#Classroom#programme#by#GeeksforGeeks#to#enhance#DSA

Supported Browsers:

• 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.