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Re: innerHTML in DocumentFragment

From: Yehuda Katz <wycats@gmail.com>
Date: Thu, 10 Nov 2011 13:05:31 +0100
Message-ID: <CAMFeDTV-xLtDgzt74kjE_8-HBFUihuyM5w+kjwj4dtpim+sczA@mail.gmail.com>
To: Henri Sivonen <hsivonen@iki.fi>
Cc: public-webapps WG <public-webapps@w3.org>
My thinking on this has evolved a bit since my original post. I wrote a
patch to the spec that creates a new "unknown context" insertion mode that,
in fact, only affects the problematic table case, and otherwise delegates
to the in-body insertion mode.

You can see it in full glory at
http://www.w3.org/Bugs/Public/show_bug.cgi?id=14694

Please let me know if that doesn't clear it up for you :)

-- Yehuda

On Thursday, November 10, 2011, Henri Sivonen wrote:

> On Fri, Nov 4, 2011 at 1:03 AM, Yehuda Katz <wycats@gmail.com<javascript:;>>
> wrote:
> > It would be useful if there was a way to take a String of HTML and parse
> it
> > into a document fragment. This should work even if the HTML string
> contains
> > elements that are invalid in the "in body" insertion mode.
> > Something like this code should work:
> >   var frag = document.createDocumentFragment();
> >   frag.innerHTML = "<tr><td>hello</td></tr>"
> >   someTable.appendChild(frag)
>
> It's easy for me to believe that there are valid use cases where the
> first tag encountered is <tr>.
>
> > This would probably require a new, laxer insertion mode, which would
> behave
> > similarly to the body insertion mode, but with different semantics in
> the "A
> > start tag whose tag name is one of: "caption", "col", "colgroup",
> "frame",
> > "head", "tbody", "td", "tfoot", "th", "thead", "tr"" case.
>
> What are the use cases for having this work with <head> and <frame> as
> first-level tags in the string? Do you also want it work with <html>,
> <body> and <frameset>?
>
> What about SVG and MathML elements?
>
> I totally sympathize that this is a problem with <tr>, but developing
> a complete solution that works sensibly even when you do stuff like
> frag.innerHTML = "<head></head>"
> frag.innerHTML = "<head><div></div></head>"
> frag.innerHTML = "<frameset></frameset>a<!-- b -->"
> frag.innerHTML = "<html><body>foo</html>bar<tr></tr>"
> frag.innerHTML = "<html><body>foo</html><tr></tr>"
> frag.innerHTML = "<div></div><tr></tr>"
> frag.innerHTML = "<tr></tr><div></div>"
> frag.innerHTML = "<g><path/></g>"
> is a much trickier problem than you <tr> example makes it first seem.
>
> Do you have use cases for tags other than <tr> appearing as the outermost
> tag?
>
> What would you expect the my examples above to do and why?
>
> --
> Henri Sivonen
> hsivonen@iki.fi <javascript:;>
> http://hsivonen.iki.fi/
>
>

-- 
Yehuda Katz
(ph) 718.877.1325
Received on Thursday, 10 November 2011 12:06:08 GMT

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