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You Don't Know JS: Scope & Closures


Год: 2014
Автор: Kyle Simpson
Жанр: Программирование
Издательство: O'Reilly Media
ISBN: Print ISBN:978-1-4493-3558-8; Ebook ISBN:978-1-4493-3553-3
Серия: You Don't Know JS
Язык: Английский
Формат: PDF
Качество: Изначально компьютерное (eBook)
Интерактивное оглавление: Да
Количество страниц: 98
Описание: No matter how much experience you have with JavaScript, odds are you don’t 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. You’ll 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 "You Don’t Know JS" 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 code
Go deeper into nested scope, a series of containers for variables and functions
Explore function- and block-based scope, “hoisting”, and the patterns and benefits of scope-based hiding
Discover how to use closures for synchronous and asynchronous tasks, including the creation of JavaScript libraries

Chapter 1. What Is Scope?
Chapter 2. Lexical Scope
Chapter 3. Function Versus Block Scope
Chapter 4. Hoisting
Chapter 5. Scope Closure

Appendix A. Dynamic Scope
Appendix B. Polyfilling Block Scope
Appendix C. Lexical this
Appendix D. Acknowledgments