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.

HTML and CSS are not programming languages per se, but they represent the basis of most sites and are therefore the starting point for a programming beginner.

jsFiddle lets developers play with the three core elements of Web development. Check out this powerful application for rapid prototyping and testing.