how to remove all Class(es) from a DOM, and then adds all Elements of an Array
function changeCSS(select, cssArray){
//function that Removes all Class(es) from a 'queried DOM'
//then adds back to that DOM element, all the entries from the 2nd parameter Array
// this only works because elem is stored in Memory
var myArray = [];
var elem = document.getElementsByClassName(select);
for(var i=0; i<elem.length; i++){
myArray.push(elem[i]);
}
myArray.forEach((item, index)=>{
console.log(myArray);
myArray[index].removeAttribute('class');
myArray[index].classList.add(select);
});
for(var ii=0; ii<elem.length; ii++){
cssArray.forEach((item, index)=>{
myArray[ii].classList.add(item);
});
}
}