Аннотация
No matter how much experience you have with JavaScript, odds are you dont fully understand the language. This concise yet in-depth guide takes you inside scope and closures, two core concepts you need to know to become a more efficient and effective JavaScript programmer. Youll learn how and why they work, and how an understanding of closures can be a powerful part of your development skillset.Like other books in the "e;You Dont Know JS"e; series, Scope and Closures dives into trickier parts of the language that many JavaScript programmers simply avoid. Armed with this knowledge, you can achieve true JavaScript mastery.Learn about scope, a set of rules to help JavaScript engines locate variables in your codeGo deeper into nested scope, a series of containers for variables and functionsExplore function- and block-based scope, hoisting, and the patterns and benefits of scope-based hidingDiscover how to use closures for synchronous and asynchronous tasks, including the creation of JavaScript libraries
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