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Re: Question about appendChild using series of divs

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Gordon wrote:
^^^^^^
Again, this is Usenet; please use your full (real) name.

> Thomas 'PointedEars' Lahn <cljs@PointedEars.de>:
>> Gordon wrote:
>> > […]  In all five cases I use appendChild to attach the div
>> > to the 'H' div.  The divs then display in the same order.
>> > (I would think they would display in reverse order,
>> 
>> Unfounded.
>> 
>> > since they are being successively appended to 'H', not
>> > to the last appended, but they don't.)
>> 
>> “Append” means “to insert at the end” (cf. “prepend”).
> 
> It depends on what 'append' means in this particular
> context.

Yes.  But I think “to append a *child* (node)” is without ambiguity.

> If we consider H as a node in a graph
> ...-H-... and appending A to H results in ...-H-A-...,
> one might think subsequently appending B to H might
> be expected to result in ...-H-B-A-..., B being placed
> directly after H.  But obviously other interpretations
> are possible.  (Here I am conflating assumptions
> about the way the append takes place and the way
> the result is subsequently displayed.)

You need to consider this not as a linear graph, but a document *tree* of 
nodes:

  H
  :-- A
  :-- B
  :-- C
  '-- D

Hence append*Child*.

>> > While the page is up, if the user clicks on a link within
>> > one of the five divs, say 'C', another set of divs is similarly
>> > created, let us say 'c1', 'c2', 'c3', ....  These I append
>> > to div 'C'.  I want them to appear below 'C' and before 'D',
>> > but instead they display below 'E'.
>> 
>> You must have appended them to 'H' instead.
> 
> So you seem to agree with my assumption above, that
> the layout procedure reads the tree such that if I have appended
> c1 to C, then I ought to observe the divs in the
> order H, A, B, C, c1, c2, ..., cn, D, .... 

No, if properly done, the elements are *nested* thus:

  H
  :-- A
  :-- B
  :-- C
  :   :-- c1
  :   :-- c2
  :   :-- ...
  :   '-- cn
  '-- D

But apparently you did:

  H
  :-- A
  :-- B
  :-- C
  :-- D
  :-- c1
  :-- c2
  :-- ...
  '-- cn

That is, if the order is not as you expected, either you appended the 
elements to the wrong parent node, or a stylesheet (which can change the 
positioning of elements in the viewport regardless of source code/node 
order) interferes.

> (For space
> reasons the content of the divs will appear vertically,
> and inserted material should push the material after it
> in the tree downward.  Hopefully.)
> 
> Historically, the makers of browsers and script
> interpreters do not seem to have felt any obligation
> to do things in any particular way, […]

You are mistaken.  Ex falso quodlibet.

-- 
PointedEars
FAQ: <http://PointedEars.de/faq> | SVN: <http://PointedEars.de/wsvn/>
Twitter: @PointedEars2 | ES Matrix: <http://PointedEars.de/es-matrix>
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Thread

Question about appendChild using series of divs gcf@panix.com (Gordon) - 2015-02-03 14:24 -0500
  Re: Question about appendChild using series of divs JJ <jj4public@vfemail.net> - 2015-02-04 07:10 +0700
    Re: Question about appendChild using series of divs gcf@panix.com (Gordon) - 2015-02-05 18:02 +0000
  Re: Question about appendChild using series of divs Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-02-04 14:23 +0100
    Re: Question about appendChild using series of divs Tim Streater <timstreater@greenbee.net> - 2015-02-04 13:34 +0000
      Re: Question about appendChild using series of divs Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-02-04 15:12 +0100
    Re: Question about appendChild using series of divs gcf@panix.com (Gordon) - 2015-02-05 17:59 +0000
      Re: Question about appendChild using series of divs Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-02-05 19:21 +0100
        Re: Question about appendChild using series of divs John Harris <niam@jghnorth.org.uk.invalid> - 2015-02-05 19:36 +0000
          Re: Question about appendChild using series of divs Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-02-07 12:07 +0100
            Re: Question about appendChild using series of divs John Harris <niam@jghnorth.org.uk.invalid> - 2015-02-07 15:20 +0000

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