Question

I was always curious is there any possibility to overload function literal, something like you can do with Function:

var test=Function; Function=function(arg) {       alert('test');       return test(arg); }  var b=Function('alert('a')'); var c=Function('alert('x')'); b(); c(); 

Of course you can guess that this is nice way of debugging whole project. However any effort I made here goes for nothing.

Question for you experts is:

1. Maybe there is something that i don’t know, maybe there is possibility to overload this damn constructor? (but probably not).
2. If not then – how to do this – if this possible – in any of browser (not just by using javascript – but their extended language – every browser got something like this).
3. If not then – how this is done trough addOn like firebug or etc. ??

Answer 1

You’re terminology is off: Function() is the function constructor, whereas function() {...} is a function literal.

And no, I don’t think there’s a portable way to do this, but there might be for old versions of Firefox: If I remember correctly, it once was possible to use with() {...} to shadow the built-in constructor functions and Firefox would use the new ones even for literals.

This seems to work no longer:

var overload = {     Object : function() {} };  overload.Object.prototype.foo = 'bar';  with(overload) {     document.writeln(new Object().foo);     document.writeln({}.foo); }