You Don't Know JS: Closures and Objects

No matter what experience you have with JavaScript programming, you likely don't fully understand the language. This concise yet deeply thought-out guide will introduce you to scopes, closures, the this keyword, and objects—concepts that are essential for more effective and productive programming in JS. You'll learn why they work and how closures can become an effective part of your development toolkit.

As in other books in the 'You Don't Know JS' series, non-trivial aspects of the language are showcased, which JavaScript programmers prefer to steer clear of. Armed with this knowledge, you will achieve true mastery of JavaScript.