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javascriptlanguage-features

Where can I learn JavaScript features not yet included in ECMAScript standard?

I just tried in Firebug console, 

let (X=10) X/2

and

[x,y]=[y,x]

These are features supported by SpiderMonkey, I guess V8 has its own share.

Where can I learn of features that are not yet included in ECMAScript, but work in various browsers? Is there a place where these are collected together?

Solution

  • And here is a article covering various resources around Harmony/ES6/Javascript.next:

    http://addyosmani.com/blog/ecmascript-6-resources-for-the-curious-javascripter/