one

two

three

Important Notes:  (source: https://www.w3schools.com/jsref/dom_obj_htmlcollection.asp)

• An HTMLCollection is not an Array!
• An HTMLCollection may look like an array, but it is not.
• You can loop through an HTMLCollection and refer to its elements with an index.
• But you cannot use Array methods like push(), pop(), or join() on an HTMLCollection.