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Re: references to DOM parts

Newsgroups comp.lang.javascript
Subject Re: references to DOM parts
From "Evertjan." <exxjxw.hannivoort@inter.nl.net>
References <DOM-20151230191146@ram.dialup.fu-berlin.de> <1etso5kfd39eq$.19v3fhasifklp$.dlg@40tude.net>
Date 2015-12-31 11:11 +0100
Message-ID <XnsA58171C47E6C6eejj99@194.109.6.166> (permalink)

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JJ <jj4public@vfemail.net> wrote on 31 Dec 2015 in comp.lang.javascript:

> On 30 Dec 2015 18:20:39 GMT, Stefan Ram wrote:
>>   I have an HTML document that starts with
>> 
>> <!DOCTYPE HTML><html xmlns="http://www.w3.org/1999/xhtml" lang="de"
>> xml:lang="de"> <head><meta charset="UTF-8">
>> 
>>   . Now, I define names for parts of the DOM via the JavaScript
>>   console:
>> 
>> h  = this.document.firstElementChild
>> hh = h.firstElementChild
>> m  = hh.firstElementChild
>> 
>>   . I perform the following evaluations in the Firefox Console
>>   (one line is input, the next is output, then this repeats):
>> 
>> m.outerHTML
>> "<meta charset="UTF-8">"
>> 
>> m.outerHTML = '<meta charset="ISO-8859-1">'
>> "<meta charset="ISO-8859-1">"
>> 
>> m.outerHTML
>> "<meta charset="UTF-8">"
>> 
>> hh.firstElementChild.outerHTML
>> "<meta charset="ISO-8859-1">"
>> 
>> this.document.firstElementChild.firstElementChild.firstElementChild.oute
>> rHTML "<meta charset="ISO-8859-1">"
>> 
>>   One can see above that the assigment to »m.outerHTML«
>>   has the intended effect when one looks at the result via »hh«,
>>   but when one is looking via »m«, one still sees the old value.
>> 
>>   The last evaluation shows that the DOM was really modified.
>>   Why do I see the new value via »hh«, but not via »m«?
> 
> Assignment to outerHTML property creates a new HTML object and if
> succeeded, it replaces the old one. So the m value is not changed. It's
> still reference to the old HTML object which is now an orphan element.

Would the "var m" assignment not prevent it 
from being a real orphan [in the sense of gabage-collectable]?

... as it can be reassigned anywhere in the DOM-tree later?


-- 
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

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Re: references to DOM parts JJ <jj4public@vfemail.net> - 2015-12-31 11:47 +0700
  Re: references to DOM parts "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-12-31 11:11 +0100
    Re: references to DOM parts JJ <jj4public@vfemail.net> - 2015-12-31 21:15 +0700
      Re: references to DOM parts Aleksandro <aleksandro@gmx.com> - 2015-12-31 13:35 -0300
        Re: references to DOM parts "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2015-12-31 19:19 +0100
          Re: references to DOM parts Aleksandro <aleksandro@gmx.com> - 2015-12-31 15:41 -0300
            Re: references to DOM parts Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2015-12-31 21:23 -0200
            Re: references to DOM parts JJ <jj4public@vfemail.net> - 2016-01-01 06:54 +0700
              Re: references to DOM parts Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-01 03:36 +0100
                Re: references to DOM parts Andrew Poulos <ap_prog@hotmail.com> - 2016-01-01 17:30 +1100
                Re: references to DOM parts Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-01 10:31 +0100
                Re: references to DOM parts "J.R." <groups_jr-1@yahoo.com.br> - 2016-01-03 00:37 -0800
                Re: references to DOM parts Andrew Poulos <ap_prog@hotmail.com> - 2016-01-03 20:10 +1100
                Re: references to DOM parts Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2016-01-03 03:32 -0800
                Re: references to DOM parts Mark - <nonemail@spamspamapam.net> - 2016-01-03 14:36 +0000
                Re: references to DOM parts Aleksandro <aleksandro@gmx.com> - 2016-01-03 16:55 -0300
                Re: references to DOM parts Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-03 23:47 +0100
                Re: references to DOM parts Aleksandro <aleksandro@gmx.com> - 2016-01-03 20:51 -0300
                Re: references to DOM parts Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-04 02:42 +0100
                Re: references to DOM parts Aleksandro <aleksandro@gmx.com> - 2016-01-03 23:13 -0300
                Re: references to DOM parts Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2016-01-04 09:07 -0200
                Re: references to DOM parts Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-04 22:17 +0100
                Re: references to DOM parts Stefan Weiss <krewecherl@gmail.com> - 2016-01-05 15:36 +0100
                Re: references to DOM parts "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-01-05 16:19 +0100
                Re: references to DOM parts Tim Streater <timstreater@greenbee.net> - 2016-01-05 18:09 +0000
                Re: references to DOM parts "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-01-05 20:13 +0100
                Re: references to DOM parts Stefan Weiss <krewecherl@gmail.com> - 2016-01-07 14:02 +0100
                Re: references to DOM parts "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2016-01-07 16:50 +0100
                Re: references to DOM parts Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-07 18:41 +0100
                Re: references to DOM parts John Harris <niam@jghnorth.org.uk.invalid> - 2016-01-07 18:12 +0000
                Re: references to DOM parts Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-07 20:18 +0100
                Re: references to DOM parts Aleksandro <aleksandro@gmx.com> - 2016-01-07 18:22 -0300
                Re: references to DOM parts John Harris <niam@jghnorth.org.uk.invalid> - 2016-01-08 10:08 +0000
                Re: references to DOM parts Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2016-01-07 18:03 -0800
                Re: references to DOM parts Dr J R Stockton <reply1600@merlyn.demon.co.uk.invalid> - 2016-01-04 21:00 +0000
                Re: references to DOM parts "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2016-01-04 16:45 -0800
            Re: references to DOM parts Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-01 03:32 +0100
              Re: references to DOM parts Aleksandro <aleksandro@gmx.com> - 2016-01-01 02:56 -0300
              Re: references to DOM parts Luuk <luuk@invalid.lan> - 2016-01-03 16:56 +0100
                Re: references to DOM parts Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-03 17:25 +0100
                Re: references to DOM parts Luuk <luuk@invalid.lan> - 2016-01-03 18:19 +0100
                Re: references to DOM parts Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-01-03 23:23 +0100
                Re: references to DOM parts Tim Streater <timstreater@greenbee.net> - 2016-01-03 22:28 +0000
                Re: references to DOM parts Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2016-01-04 09:09 -0200

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