if classList contains code example

Example 1: javascript check if element has class

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

Example 2: js check for class in classList

element.classList.contains(className);

Example 3: if classlist contains js

element.classList.contains(class);

Example 4: classList has class

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