Re: Add extra argument to addEventListener with the context

• From: Boris Zbarsky <bzbarsky@MIT.EDU>
• Date: Fri, 15 Jun 2012 13:29:15 -0400
• To: www-dom@w3.org
• Message-ID: <4FDB70EB.3060307@mit.edu>

On 6/15/12 1:21 PM, Elliott Sprehn wrote:
> Google Closure supports an additional final argument to addEventListener
> that's the context the method is called with:
>
> target.addEventListener(event, fn, capture, context)
>
> So you could do
>
> target.addEventListener(event, this.handleClick, false, this);
>
> and later
>
> target.removeEventListener(event, this.handleClick, false, this);
>
> It'd be nice to get native support since it makes adding and removing
> listeners easier.

How is this different from doing:

   this.handleClick = this.handleClick.bind(this);

once and then doing?:

   target.addEventListener(event, this.handleClick, false);
...
   target.removeEventListener(event, this.handleClick, false);

-Boris

Received on Friday, 15 June 2012 17:29:46 UTC