Tip: Learn more about the className property in our JavaScript Reference. Please help me with this. The following example will remove the class .page-header from … function (index,currentclass) Optional. There are three types of jQuery method available to add remove classes of the selected html elements, you can use these methods to add remove class of the elements. If the class does not exist, it is added. add In JavaScript, we have a classList property which contains a add() method that … jQuery removeClass and addClass Example - Tuts Make To add and remove a CSS class with JQuery is done with the addClass and removeClass methods. A function returning one or more space-separated class names or an array of class names to be removed. add The … The constructor() method is called automatically when a class is initiated, and it has to have the exact name "constructor", in fact, if you do not have a constructor method, JavaScript will add an invisible and empty constructor method. We used the classList.contains method to check if the body element has a specific class. document.body.className += " something"; Otherwise. 1) Add or Appending CSS Class Using Javascript. There are 3 popular methods which can be used to insert or add an object to an array. If it's not present, just concatenate a blank character and the new class name to this property. In this tutorial you will learn how to add or remove CSS classes using jQuery. To add a new element to the HTML DOM, we have to create it first and then we need to append it to the existing element.. Steps to follow. onclick add class and remove class javascript. There are 2 ways to add and remove class using onclick event using the same button. Angular dynamically add and remove CSS Classes using ngClass