A collection of nodes. A node is a single point in a node tree. For example, a HTML document is represented as a node tree. The DOM is used to access and manipulate the document. Can iterate over using forEach() or a for loop. Can be converted to an array.
Some are LIVE and some are STATIC
- Live: changes in the DOM will automatically update a collection such as parent's childNodes.
- Static: changes in the DOM doesn't affect the content of a collection. This is the case with querySelectorAll().
Whether is's static or live will determine how you iterate over the items of a nodeList. https://developer.mozilla.org/en-US/docs/Web/API/NodeList
Arrays are list-like objects