Which of the following methods can be used to add a class to an HTML element in JavaScript?OptionsaddClass()element.addClass()element.classList.add()element.addClassName()

The correct method to add a class to an HTML element in JavaScript is element.classList.add().

Here's how you can do it:

1. First, you need to select the HTML element. You can do this using various methods like getElementById(), getElementsByClassName(), getElementsByTagName(), or querySelector(). For example:

let element = document.getElementById('myElement');

2. Once you have the element, you can add a class to it using classList.add() method. For example, if you want to add a class named 'newClass', you would do it like this:

element.classList.add('newClass');

This will add the 'newClass' to the 'myElement' HTML element.

The other methods mentioned in the options such as addClass(), element.addClass(), and element.addClassName() are not standard JavaScript methods for adding a class to an HTML element.