Question

I wish to extend the String class and add a simple method:

String.prototype.world = function(){
  return " world";
} 

and I want to do something like:

"hello".world

and get back "hello world". instead of doing:

"hello".world()

calling a function without brackets will return the function object.

What I’m looking for is to execute the function instead of returning it (without specifying the brackets).

Can I do it somehow in JavaScript?

EDIT: according to this, using __defineGetter__ is non standard and deprecated. looking for alternativs.

Answer 1

You can do that using setter getter. jsfiddle. but setter getter are not supported by IE < 9;

 function getter(){
    return this + " world";
  }
  if(Object.__defineGetter__){ // chrome 
  String.prototype.__defineGetter__('world', getter);
}else{
 Object.defineProperty(String.prototype, 'world', { // IE
                    get : getter
                });
}