Benefit of this solution:

1. You only need one bind to $(document). Other firing of events would depend on the $emit of scope events.
2. You could use both expressions click-elsewhere="show=false", and click-elsewhere="fn()", thanks to $parse.

Usage in HTML:

Same with ng-click:

1. click-elsewhere="fn()"
2. click-elsewhere="show=false"

A little bit on $parse:

Basically what $parse does is that it converts Angular expression into a function, which could then be called with the scope you want applied to. It’s probably about the entrance to Angular’s magic 🙂