Well, as a long time fan of Firefox, I am sitting here with quite the smile on my face. Not sure how long it will last but this little victory is rather sweet.
1. Destructuring references is not yet supported on Chrome
[a,b,c]=[c,d,f]
[a,b]=[b,a+b]
[1,2,3,4].map(function(x) x*x)) // [1,4,9,16]
Granted CoffeeScript makes some of these easy, but they are too paranoid in my opinion to support new and useful syntaxes (e.g. yield keyword for generators, getters/setters).
[1,2,3,4].map(x => x * x) // [1,4,9,16]
This blog post explains the differences between these functions and current functions: http://javascriptweblog.wordpress.com/2012/04/09/javascript-...; i wish the unbound "->" alternative is included, so that functions used as methods can also use the new syntax.
Eh. Yea, Firefox got support for that (and `let` and generators/iterators), because they added it in 2006 (Firefox 2.0) as an experimental feature.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_...
[1,2,3,4].map(x => x*x)) // [1,4,9,16]
Also, destructuring objects:
let obj = { foo: 42, bar: { baz: 32 } }
let { foo, bar } = obj;
foo // 42
bar.baz // 32
List of all the goodies: https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_...
edit: formatting