JavaScript Tutorial

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Javascript Add Class onClick

In this tutorial, we will learn how to add or remove a class from an HTML element using JavaScript. We can use the classList property of an element to access and modify its classes. We will see two examples of how to do this. In the first example, we will use the add() and remove() methods to add or remove a specific class. In the second example, we will use the toggle() method to switch a class on or off depending on its current state.

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How to Add and Remove Class in Javascript onclick?

This is the first example of this tutorial where we use add() and remove() functions of js to add specific class to element.

Js onclick add class

<script>
 const element = document.getElementById("myElement");
 const button = document.getElementById("button");
 button.addEventListener("click", function() {
  if (element.classList.contains("highlight")) {
   element.classList.remove("highlight");
   button.textContent = "Add Highlight";
  } else {
   element.classList.add("highlight");
   button.textContent = "Remove Highlight";
  }
 });
</script>

Run

Output of Javascript Add Remove Class

Example 2 : Javascript Toggle Class to Div onClick Button

This is the second example of this tutorial where we used the toggle method to add or remove a class to a specific div in JavaScript

 <script>
  document.addEventListener("DOMContentLoaded", function() {
   const element = document.getElementById("myElement");
   const button = document.getElementById("button");
   button.addEventListener("click", function() {
    element.classList.toggle("highlight");
   });
  });
 </script>