In Javascript, is it true that function aliasing works as long as the function being aliased doesn't
- by Jian Lin
In Javascript, if we are aliasing a function, such as in:
f = g;
f = obj.display;
obj.f = foo;
all the 3 lines above, they will work as long as the function / method on the right hand side doesn't touch this? Since we are passing in all the arguments, the only way it can mess up is when the function / method on the right uses this?
Actually, line 1 is probably ok if g is also a property of window? If g is referencing obj.display, then the same problem is there.
In line 2, when obj.display touches this, it is to mean the obj, but when f() is invoked, the this is window, so they are different.
In line 3, it is the same: when f() is invoked inside of obj's code, then the this is obj, while foo might be using this to refer to window if it were a property of window. (global function).
So line 2 can be written as
f = function() { obj.display.apply(obj, arguments) }
and line 3:
obj.f = function() { foo.apply(window, arguments) }
Is this the correct method, and are there there other methods besides this?
