element classlist first of multiple classes code example

Example 1: javascript check if element has class

if(document.getElementById("myElmentID").classList.contains("hidden")){
// I have the 'hidden' class
}

Example 2: javascript loop over classlist

var myElements = document.getElementsByClassName("some_class_name");
for(var i = 0; i < myElements.length; i++){
	console.log(myElements[i]);
}