Re: remove listener

From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups	comp.lang.javascript
Subject	Re: remove listener
Date	2017-01-23 20:14 +0100
Organization	PointedEars Software (PES)
Message-ID	<4757540.29KlJPOoH8@PointedEars.de> (permalink)
References	<_N2dnVScZPU0SR_FnZ2dnUU7-IXNnZ2d@westnet.com.au> <4137428.rnE6jSC6OK@PointedEars.de> <ebKdnbTeM4E0nB7FnZ2dnUU7-T3NnZ2d@westnet.com.au> <w8ydnVs1-tbith7FnZ2dnUU7-TXNnZ2d@westnet.com.au> <4v-dnTZ7z6m9rR7FnZ2dnUU7-K1j4p2d@westnet.com.au>

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Andrew Poulos wrote:

> On 21/01/2017 8:35 PM, Andrew Poulos wrote:
>> How can I remove the listener if the handler is
>>   this.show.bind(this, i)
>> ?
> 
> My bad for wasting everyone's time. MDN tells me that bind creates a new
> bound function. I just stored a reference to it and used that instead.

That is the correct solution.  It is usually called an “event registry”.

I think it is unfortunate that, with the exception of event listeners added 
using event-handler properties, there is no built-in way without having to 
do that.  At least the built-in Map type (which allows object references as 
keys directly) introduced with ECMAScript 2015 now allows one to register 
event listeners per DOM object instead of per DOM object serialization and, 
if necessary, linear search.

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PointedEars
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Thread

remove listener Andrew Poulos <ap_prog@hotmail.com> - 2017-01-21 14:25 +1100
  Re: remove listener Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-01-21 06:07 +0100
    Re: remove listener Andrew Poulos <ap_prog@hotmail.com> - 2017-01-21 17:37 +1100
      Re: remove listener Andrew Poulos <ap_prog@hotmail.com> - 2017-01-21 20:35 +1100
        Re: remove listener Andrew Poulos <ap_prog@hotmail.com> - 2017-01-21 20:55 +1100
          Re: remove listener Scott Sauyet <scott@sauyet.com> - 2017-01-21 19:24 +0000
          Re: remove listener Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-01-23 20:14 +0100

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