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Re: DOM3 Events call today/tonight?

From: Charles McCathieNevile <chaals@opera.com>
Date: Thu, 26 Feb 2009 11:31:54 +0100
To: "Sean Hogan" <shogun70@westnet.com.au>
Cc: "Garrett Smith" <dhtmlkitchen@gmail.com>, "WebApps WG" <public-webapps@w3.org>
Message-ID: <op.upyfjgi2wxe0ny@widsith.local>
On Thu, 26 Feb 2009 04:49:47 +0100, Sean Hogan <shogun70@westnet.com.au>  
wrote:

> Charles McCathieNevile wrote:
>> On Wed, 25 Feb 2009 22:59:06 +0100, Sean Hogan  
>> <shogun70@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
http://my.opera.com/chaals       Try Opera: http://www.opera.com
Received on Thursday, 26 February 2009 10:32:43 GMT

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