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).

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:

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 …

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.

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

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 …

Dec 15, 2025 · In this guide, we’ll explore how to safely add a class to an element in JavaScript without overwriting its existing classes. We’ll cover the root of the problem, the solution using the classList …

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 …

Jun 9, 2023 · In this blog, we'll learn how to add a class to an HTML element using JavaScript. Adding classes to HTML elements is a common way to apply CSS styles and manipulate the appearance …

Jan 29, 2024 · Learn how to add a class to an element in JavaScript using className, classList, toggle and setAttribute method, with examples.