On Tue, 28 Oct 2008, Boris Zbarsky wrote:
> Ian Hickson wrote:
> > On Thu, 18 Jan 2007, Boris Zbarsky wrote:
> > > There has recently been an interesting Mozilla bug report about onchange
> > > for radio inputs.  It seems that UAs interoperably implement something
> > > non-obvious; it may be a good idea to specify it:
> > > 
> > > https://bugzilla.mozilla.org/show_bug.cgi?id=363693
> > 
> > Done.
> 
> Is http://www.w3.org/html/wg/html5/#event-input-change the relevant spec 
> text?

The relevant spec text is in several places.

For radio buttons in particular:

   http://www.whatwg.org/specs/web-apps/current-work/#radio-button-state

# If the element is mutable, then: The pre-click activation steps consist 
# of setting the element's checkedness to true. The canceled activation 
# steps consist of setting the element's checkedness to false. The 
# activation behavior is to fire a simple event called change at the 
# element.

Most of the terms in that paragraph are to do with (and are hyperlinked 
to) the algorithms defined in:

   http://www.whatwg.org/specs/web-apps/current-work/#interactive-content

Please let me know if that doesn't make sense, and I'll try to clarify it.

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

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