New releases are published several times a month.Īnything that is not present in the published version is considered a work-in-progress and may be incomplete or incorrect. The content may be incomplete but should be correct. The published version is available for free and contains the latest 'blessed' version. How modules will change the way you organize code.Why people are so excited about promises for asynchronous programming.The power of inheriting from native types.Additional options for storing data using sets, maps, and more.How arrow functions differ from regular functions.Why iterators and generators are useful.How the new class syntax relates to more familiar JavaScript concepts.All of the changes to the language since ECMAScript 5.It is not specific to any JavaScript environment, so it is equally useful to web developers as it is Node.js developers. This book is a guide for the transition between ECMAScript 5 and 6.

While it will take a bit of time before all JavaScript environments support ECMAScript 6, it's still useful to understand what's coming and which features are available already. The result of years of study and debate, ECMAScript 6 reached feature complete status in 2014. Not only does the sixth edition add new object types, but also new syntax and exciting new capabilities. ECMAScript 6 represents the biggest change to the core of JavaScript in the history of the language.

Ecmascript 6