No matter how much experience you have with JavaScript, odds are you don't fully understand the language. This compact guide serves as an introduction to the "You Don't Know JS" series, which dives into trickier parts of the language that many JavaScript programmers simply avoid-or use incorrectly. In this compact guide, author Kyle Simpson explains basic JavaScript language concepts and shows developers how to take advantage of them, while exposing various misconceptions. Perfect for programmers who aren't familiar with JavaScript, this book helps you to get the most out of other books in the series-and guides you toward true JavaScript mastery.