No matter how much experience you have with JavaScript, odds are you don{u2019}t fully understand the language. As part of the "You Don{u2019}t Know JS" series, this concise yet in-depth guide focuses on new asynchronous features and performance techniques{u2014}including Promises, generators, and Web Workers{u2014}that let you create sophisticated single-page web applications and escape callback hell in the process. Like other books in this series, You Don{u2019}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{u2019}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 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 programmingUnderstand how callbacks let third parties control your program’s executionAddress the 'inversion of control' issue with JavaScript PromisesUse generators to express async flow in a sequential, synchronous-looking fashionTackle program-level performance with Web Workers, SIMD, and asm.jsLearn valuable resources and techniques for benchmarking and tuning your expressions and statements No matter how much experience you have with JavaScript, odds are you don鈥檛 fully understand the language. As part of the "You Don鈥檛 Know JS" series, this concise yet in-depth guide focuses on new asynchronous features and performance techniques鈥攊ncluding Promises, generators, and Web Workers鈥攖hat let you create sophisticated single-page web applications and escape callback hell in the process. Like other books in this series, You Don鈥檛 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鈥檚 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 ** No matter how much experience you have with JavaScript, odds are you don{u2019}t fully understand the language. As part of the "You Don{u2019}t Know JS" series, this compact guide focuses on the new asynchronous features in JavaScript, which are often confusing to developers. You'll learn about promises, generators, and coroutines, all of which allow you to create more sophisticated single-page web applications that provide the features of a desktop application without tying up the user's browser. Like other books in this series, You Don{u2019}t Know JS: Async & Performance dives into trickier parts of the language that many JavaScript programmers simply avoid. Armed with this knowledge, you can achieve true JavaScript mastery