λ and function javascript

Question

is there any way to map the λ key to the function keyword? so that these work:

var rFalse = λ() {
  return false;
}

(λ(){
  var str = "i'm in a closure";
}());

window.onload = λ() {
  alert('window loaded');
}

I know that they are attempting to put a shortened function keyword in ecmascript v6, but I'm wondering if it is possible to do it now.

Answer 1

JavaScript does not offer aliasing of keywords, so it is not possible make the syntax you're trying to use valid.

Answer 2

I wouldn't think so, since function is a keyword... You'll have hard time passing your program through the parser.

Answer 3

It is possible, just not natively. You'd have to look into implementing or using an existing DSL.

A good example could be CoffeeScript, which includes an Extras script for running on client-side via:

<script type="text/coffeescript">

Their contents are converted to and reinserted into the document as JavaScript by:

<script src="extras/coffee-script.js"></script>

However, keep in mind that client-side DSLs risk drastically increasing load times and ruining the user experience -- CoffeeScript is primarily server-side for a reason.