[Bug 28212] New: Making an element with tabindex attribute to be an interactive content breaks backward compatibility

https://www.w3.org/Bugs/Public/show_bug.cgi?id=28212

            Bug ID: 28212
           Summary: Making an element with tabindex attribute to be an
                    interactive content breaks backward compatibility
           Product: HTML WG
           Version: unspecified
          Hardware: PC
               URL: https://html.spec.whatwg.org/multipage/dom.html#intera
                    ctive-content-2
                OS: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: HTML5 spec
          Assignee: dave.null@w3.org
          Reporter: arai.unmht@gmail.com
        QA Contact: public-html-bugzilla@w3.org
                CC: mike@w3.org, public-html-admin@w3.org,
                    public-html-wg-issue-tracking@w3.org

Created attachment 1584
  --> https://www.w3.org/Bugs/Public/attachment.cgi?id=1584&action=edit
demo for tabindex, label, and input

Originally reported here:
  https://bugzilla.mozilla.org/show_bug.cgi?id=1141455
  https://bugzilla.mozilla.org/show_bug.cgi?id=1135374

In the attached demo (copied from http://jsbin.com/budisehuyo/3/ ), what the
spec says is that clicking on the span element should not turn on/off the
checkbox, right?

https://html.spec.whatwg.org/multipage/forms.html#the-label-element:the-label-element-10
> The activation behaviour of a label element for events targeted at interactive
> content descendants of a label element, and any descendants of those
> interactive content descendants, must be to do nothing.

https://html.spec.whatwg.org/multipage/dom.html#interactive-content-2
> Interactive content is content that is specifically intended for user
> interaction.
> The tabindex attribute can also make any element into interactive content.

Now it's implemented in Firefox Developers Edition 38.0a2 (2015-03-13) and
Firefox Nightly 39.0a1 (2015-03-13).  But the behavior is different from
previous versions and other browsers, and it causes compatibility problem in
capitainetrain.com (see https://bugzilla.mozilla.org/show_bug.cgi?id=1135374 ).

Could we remove "The tabindex attribute can also make any element into
interactive content." from 3.2.4.2.7, or add some restriction to make it
backward compatible?

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Received on Friday, 13 March 2015 22:18:40 UTC