Modules leverage scope and closures to encapsulate data and behavior. On top of lexical scope, closure empowers functions with memory, preserving variables across calls. Scope & Closures, the second book in the new edition series, dives deep into how and why to organize variables into different buckets of scope, limiting scope over-exposure and improving code maintainability. And of course, through Kyle's unique perspective and conversational tone, explore passionate, reasoned debate of the most common questions developers face. You'll still get in-depth coverage of the core language, applied in useful code organization patterns for your programs. All 6 books are brand new, rewritten to cover all sides of JS for 2020 and beyond. The worldwide best selling You Don't Know JS book series is back for a 2nd edition: You Don't Know JS Yet.
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