Nov 28, 2016 · To add an additional class to an element: To add a class to an element, without removing/affecting existing values, append a space and the new classname, like so:

Add Class Step 1) Add HTML: Add a class name to the div element with id="myDIV" (in this example we use a button to add the class).

Jul 11, 2025 · Both .className and .classList.add () are effective ways to add classes to HTML elements using JavaScript. If you want to overwrite all existing classes, use .className. However, if …

Jul 25, 2025 · Explore effective JavaScript methods for dynamically adding and removing CSS classes from HTML elements, ensuring cross-browser compatibility and performance.

Mar 20, 2025 · This article explores methods for adding classes to elements, focusing on practical examples relevant to testing workflows. examples to demonstrate how to add classes to elements …

This tutorial shows you how to add one or more classes to an element in JavaScript

Read the tutorial and learn the two suggested methods of creating a JavaScript function that will add a class to the <div> element and solve your problem.

Jun 29, 2025 · The simplest way to add a CSS class to an element in JavaScript is through the classList API. It is part of the JavaScript DOM and gives us high-level methods. Rather than juggling with …

Oct 12, 2025 · The classList.add() method adds the specified class to the element’s class list without removing existing classes. It automatically prevents duplicate classes and handles multiple class …

Jan 29, 2024 · In this article, we will learn how to add a class to an element in JavaScript using various methods. As we know, JavaScript is the programming language used to dynamically change the …