# Introduction to Adding a Class Name to an Element in JavaScript JavaScript is a powerful scripting language used to create interactive websites. It can be used to add dynamic elements to a web page, such as graphics, animations, and user interfaces. It can also be used to add a class name to an element on the page. Adding a class name to an element allows the user to assign a specific set of styling rules to that element. This can be used to create a more visually appealing page, as well as to add additional functionality. By assigning a class name to an element, the user can quickly and easily change the look and feel of the page in real time. In this article, we'll discuss how to add a class name to an element in JavaScript. We'll also provide some examples to help illustrate the process. With this information, you'll have the knowledge to easily and quickly add a class name to an element on your web page.

// Algorithm 1. Create a variable and set it equal to the element you want to add a class name to. 2. Create a variable and set it equal to the class name you want to add to the element. 3. Use the element's classList.add() method to add the class name to the element. 4. Return the element with the added class name. // Sample Code let element = document.getElementById("mydiv"); let className = "newclass"; element.classList.add(className); return element;