You Don’t Know JS: Scope & Closures

You Don’t Know JS: Scope & Closures Front Cover
10 Reviews
98 pages

Book Description

No matter how much experience you have with , 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 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
  • Go deeper into nested scope, a series of containers for variables and
  • Explore function- and block-based scope, “hoisting”, and the and benefits of scope-based hiding
  • Discover how to use closures for synchronous and asynchronous tasks, including the creation of JavaScript libraries

Table of Contents

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

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

Book Details

  • Title: You Don’t Know JS: Scope & Closures
  • Author:
  • Length: 98 pages
  • Edition: 1
  • Language: English
  • Publisher:
  • Publication Date: 2014-03-24
  • ISBN-10: 1449335586
  • ISBN-13: 9781449335588