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Re: removeEventListener why

From "Julio P. Di Egidio" <julio@diegidio.name>
Newsgroups comp.lang.javascript
Subject Re: removeEventListener why
Date 2017-02-07 05:51 +0100
Organization A noiseless patient Spider
Message-ID <o7bjl9$rir$1@dont-email.me> (permalink)
References <hbCdnUYE2rVRhQTFnZ2dnUU7-dvNnZ2d@westnet.com.au>

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"Andrew Poulos"  wrote in message 
news:hbCdnUYE2rVRhQTFnZ2dnUU7-dvNnZ2d@westnet.com.au...
>
> If I use addEventListener on an element in the page should I then use 
> removeEventListener before the page is unloaded?
>
> Is it good practice to remove all listeners I add or does it make no 
> difference? I'm usually careful about removing all listeners I add but I 
> don't know if today it serves any real purpose.
>
> In the past I used to be worried about memory leaks. Is it still an issue?

Yes, you should destroy all event handlers before the page is unloaded, 
browsers may, and AFAICT still do, leak memory otherwise.  There was an 
article explaining the details which I cannot find now: it was about 
orphaned references not getting automatically released... or something along 
that line.

HTH,

Julio

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removeEventListener why Andrew Poulos <ap_prog@hotmail.com> - 2017-02-07 11:46 +1100
  Re: removeEventListener why "Julio P. Di Egidio" <julio@diegidio.name> - 2017-02-07 05:51 +0100
    Re: removeEventListener why "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-02-07 11:41 +0100
      Re: removeEventListener why Julio Di Egidio <julio@diegidio.name> - 2017-02-07 03:00 -0800
        Re: removeEventListener why "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-02-07 12:44 +0100
      Re: removeEventListener why JJ <jj4public@vfemail.net> - 2017-02-07 22:50 +0700
        Re: removeEventListener why "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-02-07 18:17 +0100
          Re: removeEventListener why JJ <jj4public@vfemail.net> - 2017-02-08 23:11 +0700
            Re: removeEventListener why "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-02-08 19:39 +0100
        Re: removeEventListener why Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-02-09 02:02 +0100
          Re: removeEventListener why Julio Di Egidio <julio@diegidio.name> - 2017-02-08 20:33 -0800
            Re: removeEventListener why "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-02-09 11:51 +0100
            Re: removeEventListener why Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-02-09 12:01 +0100
          Re: removeEventListener why JJ <jj4public@vfemail.net> - 2017-02-09 18:36 +0700
            Re: removeEventListener why Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-02-09 13:09 +0100
  Re: removeEventListener why "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2017-02-07 06:32 -0800
    Re: removeEventListener why Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-02-07 17:31 +0100
      Re: removeEventListener why Julio Di Egidio <julio@diegidio.name> - 2017-02-07 11:59 -0800
        Re: removeEventListener why Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-02-07 21:55 +0100
          Re: removeEventListener why Julio Di Egidio <julio@diegidio.name> - 2017-02-07 13:23 -0800
            Re: removeEventListener why "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2017-02-08 06:03 -0800
      Re: removeEventListener why "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2017-02-08 05:54 -0800

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