class list contains code example

Example 1: add multiple classList

element.classList.add(class1,class2,class3...);

Example 2: if classlist contains js

element.classList.contains(class);

Example 3: css class list

var myElement = document.getElementById("myElementID");
myElement.classList.add("style1 style2");
myElement.classList.remove("style1 style2");

Example 4: classList has class

if (document.body.classList.contains('thatClass')) {
    // do some stuff
}

Example 5: class list contains class java

List<Card> hand = ...;
for(Card card : hand){
  if (card instanceof AceOfDiamonds) return true;
}