102220 2012-11-14 06:03:10 -0800 [CSS Regions] Don't attach the content to a flow thread unless there's a valid region chain 2022-07-13 09:26:07 -0700 1 1 1 Unclassified WebKit WebCore Misc. 528+ (Nightly build) Unspecified Unspecified RESOLVED WONTFIX P2 Normal --- 128243 1 abucur abucur bfulgham donggwan.kim mihnea WebkitBugTracker oldest_to_newest 766805 0 abucur 2012-11-14 06:03:10 -0800 The CSS Regions spec states: The process for resolving an RFCB's ‘height’ and the three-step process used to lay out documents containing regions and named flows are conceptual descriptions of what the layout should yield and implementations should optimize to reduce the number of steps and phases necessary wherever possible. A good optimization is to skip the layout altogether if there are no regions to receive content (basically there's no point in generating fragments if there are no regions to contain them). 991144 1 abucur 2014-03-17 00:56:04 -0700 An even better optimization is actually not attaching the content at all if there is no valid region chain. Rename the bug to track this instead. 1883075 2 bfulgham 2022-07-13 09:26:07 -0700 CSS Regions were removed in Bug 174978.