Be warned: It’s not for complete beginners and does expect you to have a basic grasp on HTML, CSS, and JavaScript. So you might want to take a shorter course first.

1. Introduction. This text-based tutorial is intended for people who learn fast through a combination of reading and images — it’s possible to learn HTML and CSS foundations in 15 minutes ...

CSS: Enter CSS to be applied to the HTML used in your tests. It is placed between <style> elements in the header portion of the page. HTML: This area allows you to enter HTML to be used in your tests.