Thimble, which is part of Mozilla's recently launched Webmaker project, is meant to help novice users write and edit basic HTML and CSS right in a web-based code editor.

We list the best HTML online courses, to make it simple and easy to improve your website design and development skills, from beginner to advanced level. HTML and CSS form the basic coding ...

Feed the network simple HTML components and teach it to generate animations using CSS. It would be fascinating to have an attention approach and visualize the focus on both input sources.

jsFiddle is the perfect solution; it provides a custom environment (based on user selections) to test (or fiddle with) your JavaScript, HTML, and CSS code right inside your browser.