All You Need to Know, and Nothing You Don't, to Write javascript for the Web and Beyondjavascript plays a key role in modern software development, not only because it is the only language that runs inside virtually all web browsers, but also because it has become widely used for back-end and general-purpose development as well. Although javascript is a big language, you don't need to learn "everything" about it to get started--just how to use it efficiently to solve real problems. In Learn Enough javascript to Be Dangerous, renowned instructor Michael Hartl teaches the specific concepts, skills, and approaches you need to be professionally productive.