Available on js
NodeList objects are collections of nodes such as those returned by properties such as Node.childNodes and the document.querySelectorAll() method.
Documentation NodeList by Mozilla Contributors, licensed under CC-BY-SA 2.5.
The number of nodes in the NodeList.
Returns an item in the list by its index, or null if the index is out-of-bounds; can be used as an alternative to simply accessing nodeList[idx] (which instead returns undefined when idx is out-of-bounds).