NEW197150
Clarify normal flow vs. stacking layers in RenderLayer 
https://bugs.webkit.org/show_bug.cgi?id=197150
Summary Clarify normal flow vs. stacking layers in RenderLayer
Simon Fraser (smfr)
Reported 2019-04-21 10:10:22 PDT
collectZOrderLayers() has logic that says: bool stacking = isStackingContext(); if (!isNormalFlowOnly()) ... but it's no clear if a layer can be neither stacking nor normal flow only.
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Simon Fraser (smfr)
Comment 1 2019-04-23 14:00:55 PDT
A position:relative layer is not normal flow, and not a stacking context.
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