[Bug 25233] New: Specify that "Optionally, a DOCTYPE” means that quirky doctypes must be ignored

https://www.w3.org/Bugs/Public/show_bug.cgi?id=25233

            Bug ID: 25233
           Summary: Specify that "Optionally, a DOCTYPE” means that quirky
                    doctypes must be ignored
           Product: HTML WG
           Version: unspecified
          Hardware: PC
               URL: http://www.w3.org/html/wg/drafts/html/master/embedded-
                    content.html#attr-iframe-srcdoc
                OS: All
            Status: NEW
          Severity: normal
          Priority: P3
         Component: HTML5 spec
          Assignee: dave.null@w3.org
          Reporter: xn--mlform-iua@xn--mlform-iua.no
        QA Contact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-admin@w3.org,
                    public-html-wg-issue-tracking@w3.org

This issue is related to bug 25232.

SITUATION: 

For docs inside @srcdoc, spec says that the DOCTYPE is optional:
http://www.w3.org/html/wg/drafts/html/master/single-page.html#attr-iframe-srcdoc
Thus, DOCTYPE is not required for @srcdoc documents.

But what should the parser do if there is a *quirky* DOCTYPE inside the
@srcdoc? Should it ignore the DOCTYPE? Or should it render the document in
quirks mode?

PROPOSAL:

We should take same attitude to this as we have taken to UTF-8. Thus, qurks
mode should *not* be spread to new contexts. Therefore, spec should point out
that "Optionally, a DOCTYPE" means that the DOCTYPE is to be ignored and thus,
that the iframe document is to be rendered in no-quirks mode.

IMPLEMENTATIONS:

* Firefox implements the proposed behavior
* Webkit and Blink (at least current release of Safari and Chrome) places the
docuent in no-quirks mode if the DOCTYPE is lacking. However, if there is a
quirky doctype, then they put the document in quirks mode.

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Received on Wednesday, 2 April 2014 16:34:47 UTC