if classlist contains js
element.classList.contains(class);
css class list
var myElement = document.getElementById("myElementID");
myElement.classList.add("style1 style2");
myElement.classList.remove("style1 style2");
class list contains class java
List<Card> hand = ...;
for(Card card : hand){
if (card instanceof AceOfDiamonds) return true;
}
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