ECMAScript 6
[Pages:67]ECMAScript 6
THE FUTURE OF JAVASCRIPT
ECMAScript
May 1995 - Created at Netscape : "Mocha" September 1995 - Shipped in Netscape 2.0 : "LiveScript"
December 1995 - Renamed to "JavaScript" August 1996 - Cloned in Microsoft IE 3.0 : "JScript"
1996..1997 - ECMA-262 Ed.1 Standard: ES 1 1998 - ES 2
1999 - ES 3 : Modern JS 2000 - ES 4 (Attempt 1) 2005..2007 - ES 4 (Attempt 2) 2008 - ES 4 Abandoned 2009 - ES 5: "use strict", JSON, Object.create, ...
2011 - ES 5.1
2014 - ES Harmony
Harmony Goals
Fix things: scoping, memory management, ... Improve productivity
Better readability / Easier maintenance Programming in the large
Standardization: Classes, Promises, ... Library/Framework Development
ES 2015
Current State
Proposals freezed, Specification not finalized yet March 2015: Publication process starts, June 2015: Formal publication
Browser Support
IE Technical Preview 69%
Firefox 37
68%
Chrome 42
48%
Runtimes
io.js
47%
NodeJS
29%
Transpilers
6to5
78%
Traceur
61%
ES6 Transpiler
26%
ES6 Support
What's New
Syntactic Sugars
Arrow Functions, Destructuring, Rest Parameters, ...
New Language Features
Block Scoping, Classes, Modules, Generators, ...
Runtime Additions
WeakMap, WeakSet, Reflect, Promise, ...
Syntactic Sugars
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