So this only happens in javascript when you pass an object function to a
variable? SO what I am saying is that not using this.func() is what looses
the connection to the instance scope and then this becaomes window, correct?
Mike
On Sun, Jun 28, 2015 at 4:48 PM, Josh Tynjala <joshtynj...@gmail.com> wrote:
> In Flash Player, when you save a reference to a member function, you can
> call the function reference, and "this" will still be bound to the instance
> where it came from.
>
> public class Test
> {
> public function Test()
> {
> this.func();
> var func:Function = this.func;
> func();
> }
>
> private function func():void
> {
> trace(this); //in Flash, "this" will always be an instance of Test
> }
> }
>
> Basically, in the code above, the two calls to func() will behave the same
> in Flash Player. However, in the current implementation of the transpiler,
> that behavior is lost. When the reference to func() is called, "this" ends
> up referring to the global window object instead.
>
> JavaScript function objects have a bind() function that let's you set what
> "this" will refer to when the function is called:
>
>
> https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind
>
> After modifying my code to use bind(), the two calls to func() will have
> the same output:
>
> public function Test()
> {
> this["func"] = this.func.bind(this);
> this.func();
> var func:Function = this.func;
> func();
> }
>
> Would it be possible for the transpiler to automatically bind all member
> functions to the correct scope to preserve the behavior that AS3 developers
> expect?
>
> - Josh
>
