On Wed, Dec 11, 2013 at 2:46 PM, Boris Zbarsky <bzbar...@mit.edu> wrote: > On 12/10/13 6:30 PM, Jonas Sicking wrote: >> >> I would also think that you need properties to position the ::popout. > > > Oh, yes. The extra fun here is: > > 1) Should the popout be able to paint outside the browser window? Right > now, comboboxes (select size=1) can but normal CSS boxes cannot. > > 2) The popout needs to pop out in different directions (up or down) > depending on the screen position of the anchor, the popout dimensions, and > the screen dimensions. > > 3) The size of the popout needs to be capped in some way. > > Maybe all that logic should just live in the UA and the page just needs a > way of saying "here is a popout thingie, anchor it here".
Yes, the "popout thingy" probably needs to be a specialized 'display' value that is only valid on the popout pseudo, so we can bottle the magic precisely. ~TJ
