delegated events are not cleaned up propperly

[volkerrichert]

If you have multiple nicescroll on a page and "remove()" one of them the delegated events are not clean up an will result in a a lot of

jquery.nicescroll.js:1259 Uncaught TypeError: Cannot read property 'rail' of null at HTMLHtmlElement.self.ontouchmove (jquery.nicescroll.js:1259) at HTMLDocument.f (jquery.nicescroll.js:2492)

when you move your mouse (touch emulation enabled).

I try to find out what happend:

• All niceScroll will register a delegate on "pointermove" self.delegate(_doc, "pointermove", self.ontouchmove) line 1653 (Chrome on Win10 with touch screen)
• but only the first niceScroll will register this event into his event list
• the 2ff will ship it, beause "pointermove" it's already in delegatevents
• if a niceScroll (not the first one) is removed it will not find event "pointermove" and the delegation will try to run ontouchmove on all(!) niceScroll.
• inside the deleted niceScroll self if null, because it's remove self = null; line 2674

[davidsturgeon]

I fixed this by changing the .delegate to a .bind I'm not sure what delegate is even doing.

[sKopheK]

Hi, @davidsturgeon have you merged your changes anywhere? We are facing the same issue and @inuyaksa does not seem to be following issues in this repository.