Native alternatives for jQuery class methods

jQuery_class_methods.js

// get reference to DOM element
var el = document.querySelector(".main-content");

//----Adding a class------

// jQuery addClass
$(el).addClass("someClass");

// native equivalent
el.classList.add("someClass");

//----Removing a class-----

// jQuery removeClass
$(el).removeClass("someClass");

// native equivalent
el.classList.remove("someClass");

//----Does it have class---

// jQuery hasClass
if($(el).hasClass("someClass"))

// native equivalent
if(el.classList.contains("someClass"))