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comp.lang.javascript

Then xmlns attribute in the XHTML DOM

ram

6/7/2016 2:04:00 AM

When no specific browser is targeted, just an implementation
of ECMAScript with the ECMAScript language bindings for DOM4,
and one wants to insert a span into the XHTML document
»this.document«, one might try this:

span = document.createElement( 'span' );
span.setAttribute( "xmlns", "http://www.w3.org/1999/x... );
document.getElementById( "example" ).appendChild( span );

, or

span = document.createElementNS( "http://www.w3.org/1999/x..., "span" );
document.getElementById( "example" ).appendChild( span )

, or even just

span = document.createElement( 'span' );
document.getElementById( "example" ).appendChild( span )

. Which of these three approaches is correct?

Especially, I'd like to know whether the last one, the one
that does no mention »w3.org«, already is correct.)
3 Answers

Osmo Saarikumpu

6/7/2016 11:46:00 AM

0

On 07/06/2016 05:04, Stefan Ram wrote:
> When no specific browser is targeted, just an implementation
> of ECMAScript with the ECMAScript language bindings for DOM4,
> and one wants to insert a span into the XHTML document
> »this.document«, one might try this:
>
> span = document.createElement( 'span' );
> span.setAttribute( "xmlns", "http://www.w3.org/1999/x... );

The span element does not have a xlmns attribute, only the document
element (html) has it.

> Especially, I'd like to know whether the last one, the one
> that does no mention »w3.org«, already is correct.)

Yes, it's the only correct one, assuming that your document has the html
element with the required xmlns attribute set.

--
Best wishes, Osmo

ram

6/7/2016 12:23:00 PM

0

Osmo Saarikumpu <osmo@weppipakki.com> writes:
>On 07/06/2016 05:04, Stefan Ram wrote:
>>When no specific browser is targeted, just an implementation
>>of ECMAScript with the ECMAScript language bindings for DOM4,
>>and one wants to insert a span into the XHTML document
>>»this.document«, one might try this:
>>span = document.createElement( 'span' );
>>span.setAttribute( "xmlns", "http://www.w3.org/1999/x... );
>The span element does not have a xlmns attribute, only the document
>element (html) has it.

I have observed this:

One can load the document from the URI

http://userpage.fu-berlin.de/~ram/pub/xhtml_jf47h...

in Firefox (it should delivered with
»application/xhtml+xml«) and then type

this.document.getElementById( "Zustand" ).outerHTML

into the console, which will make Firefox print

"<span xmlns="http://www.w3.org/1999/x... id="Zustand">(unbekannt)</span>"

. Now, one might ask:

What string do I have to assign to
»this.document.getElementById( "Zustand" ).outerHTML«
if I want nothing to be changed?

The obvious answer would as in the assignment

this.document.getElementById( "Zustand" ).outerHTML =
this.document.getElementById( "Zustand" ).outerHTML;

But given that
»this.document.getElementById( "Zustand").outerHTML«
is
»"<span xmlns="http://www.w3.org/1999/x... id="Zustand">(unbekannt)</span>"«,
this would be the same as the assignment

this.document.getElementById( "Zustand" ).outerHTML =
"<span xmlns="http://www.w3.org/1999/x... id="Zustand">(unbekannt)</span>"

. That's why I asked.

ram

6/7/2016 12:32:00 PM

0

ram@zedat.fu-berlin.de (Stefan Ram) writes:
>One can load the document from the URI
>http://userpage.fu-berlin.de/~ram/pub/xhtml_jf47h...
>in Firefox (it should delivered with
>»application/xhtml+xml«) and then type

To make this clear. The source code of the document is:

<!DOCTYPE HTML><html xmlns="http://www.w3.org/1999/x... lang="de" xml:lang="de">
<head><meta charset="UTF-8" /><title>Hallo</title><style type="text/css">
</style></head><body>
<h1>Vornamen</h1>
<ul id="erste">
<li class="m a" id="Anton">Anton</li>
<li class="w b" id="Berta">Berta</li></ul>
<ul id="zweite">
<li class="c m" id="Cäsar">Cäsar</li>
<li class="d e w" id="Dora">Dora</li></ul>
<p>Es ist zur Zeit <span id="Zustand">(unbekannt)</span>.</p>
<pre><code><script type="application/javascript;version=1.8">/*<![CDATA[*/
/*]]>*/</script></code></pre></body></html>

. So, when Firefox is printing the outer HTML of the span as

"<span xmlns="http://www.w3.org/1999/x... id="Zustand">(unbekannt)</span>"

it has /added/ the xmlns attribute which is not written in
the page source.