While JavaScript was taking over the web, and CSS was gaining new superpowers year over year, it could seem like HTML was content to stay dormant, happy to cede center stage to its younger siblings. After all once you've learned about <div>s and <h>s 1 through 6, what else is there to know? Quite a lot, as it turns out! Once again we drafted Lea Verou to put her in-depth knowledge of the web platf