Fwd: "delay" keyword

Ian Hickson ian at hixie.ch
Mon Jul 9 12:57:14 PDT 2012

On Thu, 5 Jul 2012, Boris Zbarsky wrote:
> It's a violation of HTML5, but so, technically, is the entire Firefox 
> event loop.  HTML5 specifies a very specific set of event queues, and 
> implementing pretty much anything other than exactly that is likely to 
> lead to page-visible spec bugs.  Of course the slow script dialog itself 
> is technically a spec violation.....
> In any case, I believe we are in the process of moving to a more 
> HTML5-like setup here (with multiple per-page event queues, etc), which 
> should more or less fix most of these issues: we'd just disable all of a 
> page's event queues when the slow script dialog comes up.
> Note that I say "most".  There are some fundamental problems here.  Say 
> the user decides to close the tab or window when they get the slow 
> script prompt (something that I think is desirable to allow the user to 
> do, personally). Should this close the tab/window without firing unload 
> events (a spec violation) or should it fire them while other script from 
> the page is on the stack and at some random point in its execution (hey, 
> another spec violation)?

Good points. I have made a note of your e-mail and will in due course 
ensure that the slow-scripts dialog and harsh termination of a tab are not 
violations of the HTML spec.

Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'

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