clase JavaScript Hass
if (myElement.classList.contains('someClassname')) {
// do something
}
Friendly Hawk
if (myElement.classList.contains('someClassname')) {
// do something
}document.body.classList.add('thisClass');
// $('body').addClass('thisClass');
document.body.classList.remove('thatClass');
// $('body').removeClass('thatClass');
document.body.classList.toggle('anotherClass');
// $('body').toggleClass('anotherClass');