https://lists.w3.org/Archives/Public/public-html/2007Jul/0546.html
Re: HTMLCollection item() vs. namedItem() with [] syntax (detailed review of the DOM) from Cameron...
https://melvingeorge.me/blog/convert-html-collection-object-to-array-javascript
How to convert an HTMLCollection object to an Array in JavaScript? | MELVIN GEORGE
Learn how to use the Array.from() method to convert an HTMLCollection object to an Array in JavaScript
how to converthtmlcollection
https://codereview.chromium.org/159503003/patch/290001/300008?context=10&column_width=80&tab_spaces=8
Source/core/html/HTMLCollection.h - Issue 159503003: Do not cause unnecessary node lists...