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By Kyle Simpson

You Don’t Know JS: Scope & Closures

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.

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Product Description

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

What Reviewers Say About The Mobile Book
A few reviewers have had the chance to read the book a few days before its release, and share their views in a non-committal way. The result is very clear: the book is worthwhile. Should you get it? Yes! Let’s see why:
christopher-butler

“I got my hands on an early copy of The Mobile Book. I’ll cut to the chase and just say this: It’s fantastic. You should own it. Really.”

— Christopher Butler

ben-howdle-reviewer

“The standard, the reference book for Mobile. I worked for a mobile web publishing company for 18 months and the depth of knowledge provided by the experts in this book is extraordinary. It blew me away. This book provides a diplomatic, comprehensive guide to understanding Mobile”

— Ben Howdle

david-bushell-reviewer

“I’ll cut to the chase for those deliberating a purchase: it’s well worth the cover price. The eBook edition is a steal! This book establishes a mindset of understanding and exploring the medium. It embraces the breadth of its domain and will set you on an exciting path.”

— David Bushell

Additional Information

Format

PDF, Mobi, epub

Cover

Hard, Soft

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Product Detail

  • Paperback : 98 pages
  • Publisher : O'Reilly Media; 1 edition (March 24, 2014)
  • Language : English
  • ISBN-10 : 1449335586
  • ISBN-13 : 978-1449335588
  • Product Dimensions : 9 x 6 x 0.2 inches

About The Author

Author

Kyle Simpson is an Open Web Evangelist from Austin, TX. He's passionate about JavaScript, HTML5, real-time/peer-to-peer communications, and web performance. Otherwise, he's probably bored by it. Kyle is an author, workshop trainer, tech speaker, and avid OSS community member.

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