The HTML You Need for JavaScript

Read a web page the way JavaScript sees it, as elements with tags, attributes and content nested inside each other, with an id or a class on the ones your code needs to find.

Updated

Cheat sheet: The HTML You Need for JavaScript
Category
JavaScript
Level
Novice
Tags
Attribute (html), class attribute (html), Element (html), html, id, JavaScript, Nesting, Tag (html)