I can tell you from experience that this is one of the best places to learn web designing. They have made it easy to learn buy giving you examples and also a place to try them out. An awesome resource of learning for beginners who want to start from the basics of HTML 5, CSS3, JavaScript, jquery, Bootstrap. They teach all the most common languages for web designing and do it in an easy to understand way. It is FREE- no basic trial thing-pay-them-then-the real deal. Highly recommended for all.
But some how now today(11/05/2016: Time 10:58am) give Error about "Service Unavailable" HTTP Error 503.