Tackle program-level performance with Web Workers, SIMD, and asm.

Use generators to express async flow in a sequential, synchronous-looking fashion.

What use is there to hoisting variables that you cant do without.

Address the “inversion of control” issue with JavaScript Promises I understand (now) that JS is a two pass system, it compiles and then executes.

If you like this book content, please check out my video training courses.

Understand how callbacks let third parties control your program’s execution I teach all my workshops exclusively through Frontend Masters.

Explore old and new JavaScript methods for handling asynchronous programming.

Armed with this knowledge, you can become a true JavaScript master. Publisher: Pragmatic Bookshelf ISBN: 9781680506051 Category: Computers Page: 284 View: 563 Read Now » The best modern JavaScript is simple. If you wanted to specify the third parameter but you didnt care about the second, youd still be forced to enter a value. 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. Writing Modern JavaScript with ES5, ES6, and Beyond Joe Morgan. 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.

No matter how much experience you have with JavaScript, odds are you don’t fully understand the language.

You dont know js hoisting