CSS classes without jquery

cssclasseswithoutjquery

 // get reference to DOM element
  var el = document.querySelector(".main-content");
 
  //----Adding a class------
 
  /* jQuery */
  $(el).addClass("someClass");
 
  /* native equivalent */
  el.classList.add("someClass");
 
  //----Removing a class-----
 
  /* jQuery */
  $(el).removeClass("someClass");
 
  /* native equivalent */
  el.classList.remove("someClass");
 
  //----Does it have class---
 
  /* jQuery */
  if($(el).hasClass("someClass"));
 
  /* native equivalent */
  if(el.classList.contains("someClass"));