Re: [PageVisibility] Are visibility change events synchronous?

On Thu, Oct 6, 2011 at 5:30 AM, Boris Zbarsky <bzbarsky@mit.edu> wrote:

> On 10/6/11 3:22 AM, Darin Fisher wrote:
>
>>    2)  The visibility state of a document changes synchronously on page
>>    navigations.  In particular, it changes to hidden (if not already
>>    hidden) synchronously after the firing of the pagehide event and
>>    changes to visible as needed synchronously before the firing of the
>>    pageshow event.
>>
>>
>> This makes sense, although Chromium does not implement a back/forward
>> page cache.  Otherwise, it sounds like we will have compatible
>> implementations.
>>
>
> Just to make sure... does that mean you fire visibilitychange on
> navigation?
>

>From my testing it looks like we do, but I've asked the engineer who
developed this feature to verify and comment on this thread.

-Darin




>
> Note that my implementation in Gecko does so no matter what's going on with
> the back/forward cache, just like we always fire pagehide/pageshow.
>
> -Boris
>
>