General Assembly has launched a new online service that teaches basic web development for free, in your browser. It's called Dash, and it lets users learn how to use HTML, Javascript, and CSS by ...

HTML provides the structure, content and layout, CSS adds style and design, and JavaScript adds functionality and interactivity.

Large projects with many programmers contributing can result in tangled code, but style guides like Idiomatic CSS offer a way out of the confusion.

These new languages utilized new abstractions to make programming easier.