In jQuery, you can manage class names of an element using the addClass(), removeClass() and toggleClass() functions. The equivalents in JavaScript are classList.add, classList.remove and classList.toggle attributes.

Refer to the following code snippet to learn how to manage class names in an element and through jQuery and vanilla JavaScript:

// Add, remove, and toggle class using jQuery
$(".blog-post").addClass("popular");
$(".blog-post").removeClass("popular");
$(".blog-post").toggleClass("popular");

// Add, remove, and toggle class using vanilla JavaScript
let blogPost = document.querySelector(".blog-post");
blogPost.classList.add("popular");
blogPost.classList.remove("popular");
blogPost.classList.toggle("popular");