Answers for "turn html collection into array"

html collection of elements to array

const boxes = Array.from(document.getElementsByClassName('box'));

create array from htmlcollection

//Use the Array.from() method to convert a nodelist or HTMLcollection into an array.

let elements = document.getElementsByClassName("classnameHere");
let arrayOfElements = Array.from(elements);

//Now arrayOfElements is iterable with methods such as .forEach().