javascrip has class code example
Example 1: javascript hasclass
if (document.body.classList.contains('thatClass')) {
// do some stuff
}
Example 2: query selector has clas
document.body.classList.add('thisClass');
// $('body').addClass('thisClass');
document.body.classList.remove('thatClass');
// $('body').removeClass('thatClass');
document.body.classList.toggle('anotherClass');
// $('body').toggleClass('anotherClass');