[whatwg] scripts, defer, document.write and DOMContentLoaded

Ian Hickson ian at hixie.ch
Sat Aug 15 20:11:52 PDT 2009

On Tue, 11 Aug 2009, Kristof Zelechovski wrote:
> 	1. The specification defines the term "script source" to mean 
> either the text or the infoset, depending whether the script is 
> text-based or XML-based.  What is the script source for type text/xml 
> then?

Assuming you mean an internal script, the children of the <script> 

> What happens when the XML is invalid?

Assuming you mean in an XHTML document, the parser would have failed long 
before the <script> element was completely parsed and executed.

If you mean a text/html document, then I don't know which XML you mean.

> 	2. Why doesn't "script source" mean the text of the script in all
> cases?

Because that would break XML-based scripting languages.

> 	3. Microsoft Internet Explorer supports XHTML as "text/xml",
> although it does not support XHTML as "application/xhtml+xml".  But I did
> not mention XHTML anywhere in my question.  OTOH, any XML makes a SCRIPT for
> IE - a "data script".  Or did you mean a "data script" to be necessarily
> plain text?  I fail to see it specified.

I have no idea what you are asking.

> 	4. So, the question is whether such data scripts are allowed to be
> loaded externally.  AIUI, they are not allowed.  AFAIK, they are supported,
> at least in MSIE.

I'm not aware of any UAs implementing an XML-based scripting language, so 
I don't know how one would be able to say.

> 	5a: XML-based scripts are not accessible as infosets, they can only
> be executed; 
> 	5b: data scripts are only text/plain; 
> 	5c: XML islands in SCRIPT elements are not supported.  In
> particular, execution of arbitrary XML data in the browser is not allowed to
> attach an XML document to the SCRIPT element.  (Why not, given that you
> allow the browser to do whatever it likes with script of type
> "application/x-whatever"?)
> Is that correct?

I have no idea what you're talking about here.

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'

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