jquery add class to node code example

Example 1: javascript add class

// getting the target element
var myElement = document.querySelector('#myElement');

// example for addding some-class to the element
myElement.classList.add('some-class');

// multiple classes can be added like this
myElement.classList.add('one-class', 'one-more-class');

// example for removing any class from the element
myElement.classList.remove('any-class');

Example 2: how to add class on the base of has class in jquery

$( "ul li" ).addClass(function( index ) {
  return "item-" + index;
});