On Thu, 26 Feb 2009 04:49:47 +0100, Sean Hogan <shogu...@westnet.com.au>
wrote:
Charles McCathieNevile wrote:
On Wed, 25 Feb 2009 22:59:06 +0100, Sean Hogan
<shogu...@westnet.com.au> wrote:
Garrett Smith wrote:
It might be worth discussing the load event;
http://www.w3.org/TR/DOM-Level-3-Events/events.html#event-load
Seems that it is "specified" to fire on Document or Element (instead
of window).
I would also suggest a progress event on document or window.
Ideally it would be triggered every 100ms during page-load.
I would suggest that the editor of the progress spec get back to
dealing with the last issues raised by Ian, but he is writing this
email :)
Sorry, I don't understand. Is the progress spec anticipated to augment
DOM-3-Events for HTMLDocument and Window?
Well, Progress events are in a seperate spec if that is what you mean.
However the issue of timing is an interesting one...
The basis for the 100ms event interval is related to the rendering of
new content on the web-page. If new content has arrived then scripts
should be able to munge it before it is rendered, or at least soon
afterwards. It doesn't matter how much content has arrived.
Is your use case for initial page loading (which I think is different from
when doing an XHR to get *more* data)? In that case I think it is more
reasonable to work at greater frequencies - although there is still the
question of how much you want to do...
When you emit an event it is pretty low cost. But when you deal with a
javascript that listens for that event and then does something else, it
is more expensive - and when that starts to eat the battery of your
mobile phone, maybe 10 times a second is more than people want.
Anyway, I leave the issue of whether to request user agents to make a
particular timing available to the specs that use progress events,
although I have reservations about the wisdom of conditioning authors
to expect things just because broadband in a few countries can deliver
them easily.
I should raise this as a request for HTML5.
yep. I think it is actually in the spec already...
cheers
Chaals
--
Charles McCathieNevile Opera Software, Standards Group
je parle français -- hablo español -- jeg lærer norsk
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