Scope and Closures

You still do not know JS. And Kyle Simpson admits that he does not know it either (at least not completely)... And no one knows. But we can all start working to learn it better. No matter how much time you have spent studying the language, there is always something else worth learning and understanding at a different level. Have you read "You Don’t Know JS"? Then open the second book in the "You Don’t Know JS" series to get closer to the first of the three pillars of JavaScript: the scope and functional closures, as well as the powerful design pattern "Module". It's time to master the rules of lexical scoping for placing variables and functions in the right positions. And take a look at a lower level, as the magic of state storage in modules is based on closures that utilize the lexical scoping system.