You Don't Know JS

ebook Async & Performance

By Kyle Simpson

cover image of You Don't Know JS

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No matter how much experience you have with JavaScript, odds are you don't fully understand the language. As part of the "You Don't Know JS" series, this concise yet in-depth guide focuses on new asynchronous features and performance techniques—including Promises, generators, and Web Workers—that let you create sophisticated single-page web applications and escape callback hell in the process.

Like other books in this series, You Don't Know JS: Async & Performance dives into trickier parts of the language that many JavaScript programmers simply avoid. Armed with this knowledge, you can become a true JavaScript master.

With this book you will:

  • Explore old and new JavaScript methods for handling asynchronous programming
  • Understand how callbacks let third parties control your program's execution
  • Address the "inversion of control" issue with JavaScript Promises
  • Use generators to express async flow in a sequential, synchronous-looking fashion
  • Tackle program-level performance with Web Workers, SIMD, and asm.js
  • Learn valuable resources and techniques for benchmarking and tuning your expressions and statements
  • You Don't Know JS