On Mon, 05 Dec 2011 22:19:33 +0100, Brady Eidson <beid...@apple.com> wrote:
I can't find a definitive answer for the following scenario:
1 - A page has a plug-in with fallback specified as follows:
<object type="application/x-shockwave-flash">
<param name="movie" value="Example.swf"/>
<img src="Fallback.png">
</object>
2 - The page is loaded, the browser instantiates the plug-in, and the
plug-in content is shown.
3 - A script later comes along and dynamically changes the <object>'s
type attribute to "application/some-unsupported-type"
Should the browser dynamically and immediately switch from the plug-in
to the fallback image?
If not, what should it do?
And is this specified anywhere?
Thanks,
~Brady
"... when neither its classid attribute nor its data attribute are
present, whenever its type attribute is set, changed, or removed: the user
agent must queue a task to run the following steps to (re)determine what
the object element represents. The task source for this task is the DOM
manipulation task source."
http://www.whatwg.org/specs/web-apps/current-work/multipage/the-iframe-element.html#the-object-element
The algorithm then determines in step 5 that there's no suitable plugin,
and falls back.
--
Simon Pieters
Opera Software
