Did you jump with both legs my reply? :-)
On Wed, Jul 29, 2009 at 1:06 PM, John Resig <jere...@gmail.com> wrote:
> An interesting suggestion - but Firefox is the only browser that supports
> onpageshow. Perhaps this is a legitimate case for using IE's conditional
> comments?
> There use to be a bug in Firefox where if you didn't
> unbind the mouse listeners on unload it would cause exceptions when the page
> was reloaded. However I'm having a hard time reproducing it now in Firefox
> 3.0+ so it seems like this can be legitimately removed.
>
> I'm open to other suggestions besides conditional comments, of course.
>
> --John
>
>
>
> On Wed, Jul 29, 2009 at 6:33 AM, James Padolsey <
> jamespadol...@googlemail.com> wrote:
>
>>
>> Good idea Mark!
>>
>> This seems to work:
>>
>> jQuery.support.bfCache = (function(){
>> document.body.setAttribute('onpageshow', 'return;');
>> return typeof window.onpageshow === 'function';
>> })();
>>
>> Event detection technique from
>>
>> http://thinkweb2.com/projects/prototype/detecting-event-support-without-browser-sniffing/
>>
>> On 29 July, 11:14, Mark Gibson <jollyt...@gmail.com> wrote:
>> > Maybe you could approach this from the other side,
>> > ie. don't add the "unload" handler if bfcache is available.
>> > You could probably use the pageshow or pagehide events to detect this.
>> >
>> > -- Mark
>> >
>> > 2009/7/29 James Padolsey <jamespadol...@googlemail.com>:
>> >
>> >
>> >
>> > > Around line ~3100 (3321 in the latest nightly) you're binding the
>> > > unload event so as to prevent any memory leaks in our favourite
>> > > browser (IE). Unfortunately the presence of an "unload" handler
>> > > disables some caching techniques used in other browsers (see
>> > >https://developer.mozilla.org/En/Using_Firefox_1.5_caching...
>> > > Specifically the "bfcache").
>> >
>> > > I know you're no longer using browser detection so I was wondering, is
>> > > there an easy and quick way to detect a browser that's going to leak
>> > > memory? ... If so, you could conditionally add the "unload" handler,
>> > > only for browsers that require it (IE)...
>> >
>> > > If there's no way of testing it then why can't you just use some
>> > > browser detection there? Is the cost of disabling the bfcache really
>> > > worth the benefit of having no browser detection in the core?
>>
>>
>
> >
>
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