jQuery to JS: removeClass, addClass, hasClass translated

className-properties-translated.js

// jQuery hasClass()
$('sel').hasClass('classname');

/**
  * Translating className properties from jQuery to plain JS v1.0
  * Created by Christopher Leonard (https://www.atseadesign.com)
  * Copyright 2018 Christopher Leonard
  * Licensed under GNU (https://opensource.org/licenses/GPL-3.0)
  * 
  * Browser support: <https://caniuse.com/#search=classList>
  * 
  * For IE 11 support use the classList polyfill (https://github.com/eligrey/classList.js)
*/
// JS classList contains()
el.classList.contains('classname');

// jQuery addClass()
$('sel').addClass('classname');

// JS classList add()
el.classList.add('classname');

// jQuery removeClass()
$('sel').removeClass('classname');

// JS classList remove()
el.classList.remove('classname');

// jQuery toggleClass()
$('sel').toggleClass('classname');

// JS classList toggle()
el.classList.toggle('classname');