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What is the use of the “no-js” class in HTML ?

  • Last Updated : 22 Apr, 2020
Geek Week

Purpose:

  • The primary purpose of the no-js class is to allow the use of CSS to style JavaScript-free pages, i.e. defining CSS styles for JavaScript-enabled browsers as well as for JavaScript-disabled browsers.
  • Thus, the “no-js” class will only be present if JavaScript has been disabled. This enables styling a pure HTML and CSS page without the use of any client side-scripting.
  • But if JavaScript is enabled, it removes the “no-js” class automatically.
  • The “no-js” class is available in the markup by default.
  • The “no-js” class is basically a way to be able to style things with or without using JavaScript.
  • The “no-js” class is added to the topmost html element which serves as an instruction for Modernizr.

Syntax:

<!--[if (gt IE 9)|!(IE)]><!--> <html lang="en" class="no-js"> <!--<![endif]-->

Example:




<!DOCTYPE html>
<html class="no-js">
  
<head>
    <script>document.documentElement.className
        = document.documentElement.className
        .replace(/\bno-js\b/g, '') + ' js ';
    </script>
  
    <!-- Other files and libraries
        to be included -->
    <head>
  
    <body>
        <center>
            <h1>GeeksforGeeks</h1>
        </center>
    </body>
  
</html>

Output:

Hey geek! The constant emerging technologies in the world of web development always keeps the excitement for this subject through the roof. But before you tackle the big projects, we suggest you start by learning the basics. Kickstart your web development journey by learning JS concepts with our JavaScript Course. Now at it’s lowest price ever!

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