[whatwg] Should events be paused on detached iframes?

Boris Zbarsky bzbarsky at MIT.EDU
Wed Aug 25 00:47:17 PDT 2010

On 8/25/10 3:31 AM, Ben Lerner wrote:
> One more question: Perhaps I'm misunderstanding what you mean by "throw
> the document away", but if it means the document gets discarded, garbage
> collected, and the DOM for that page doesn't exist any more... if you
> had a page that mutated a hibernated document with a *single* DOM call,
> then no exception would be thrown but the page would vanish and perhaps
> eventually reload. But if the page mutated a hibernated document with
> *two* DOM calls, wouldn't the second one fail anyway, because the
> document was thrown away? So we trade one exception for another...

"throw away" in this context means throw away from the back/forward 
cache.  The document is still there, and can still be mutated, etc, but 
can no longer become live again.

> Hmm, that is tricky, and a timing bug indeed. That points out another
> potential question -- if the user navigates away from a page with an
> active XHR/JPEG-push/whatever connection, will Gecko then force that
> page to stay alive, and continue running script?

No.  If it's got an active XHR or JPEG-push we just stop that network 
load and don't cache the page's DOM.


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