196819 2019-04-11 06:56:20 -0700 Misplaced and wrongly clipped position:absolute inside async overflow scroll 2019-04-11 06:57:04 -0700 1 1 1 Unclassified WebKit Scrolling WebKit Nightly Build Unspecified Unspecified NEW P2 Normal --- 1 simon.fraser simon.fraser koivisto simon.fraser oldest_to_newest 1526369 0 367218 simon.fraser 2019-04-11 06:56:20 -0700 Created attachment 367218 Testcase Some configurations of position:absolute/overflow:hidden inside overflow:scroll trigger bad clipping and movement when scrolling. 1526370 1 simon.fraser 2019-04-11 06:56:41 -0700 Here we need to teach the scrolling tree about ancestor clipping layers. 1526371 2 simon.fraser 2019-04-11 06:57:04 -0700 This affects agoda.com 367218 2019-04-11 06:56:20 -0700 2019-04-11 06:56:20 -0700 Testcase nested-absolute-with-clipping-in-relative-in-overflow.html text/html 1148 simon.fraser PCFET0NUWVBFIGh0bWw+Cgo8aHRtbD4KPGhlYWQ+CiAgICA8c3R5bGU+CiAgICAgICAgLnNjcm9s bGVyIHsKICAgICAgICAgICAgbWFyZ2luOiAyMHB4OwogICAgICAgICAgICB3aWR0aDogNDAwcHg7 CiAgICAgICAgICAgIGhlaWdodDogNDAwcHg7CiAgICAgICAgICAgIG92ZXJmbG93OiBhdXRvOwog ICAgICAgICAgICBib3JkZXI6IDIwcHggc29saWQgcmdiYSgwLCAwLCAxMjgsIDAuNSk7CiAgICAg ICAgICAgIHBhZGRpbmc6IDEwcHg7CiAgICAgICAgICAgIGxpbmUtaGVpZ2h0OiAxLjVlbTsKICAg ICAgICB9CiAgICAgICAgCgogICAgICAgIC5jYXJkLWNvbnRhaW5lciB7CiAgICAgICAgICAgIHBv c2l0aW9uOiByZWxhdGl2ZTsKICAgICAgICAgICAgYm9yZGVyOiAycHggc29saWQgZ3JheTsKICAg ICAgICAgICAgaGVpZ2h0OiAxMDAwcHg7CiAgICAgICAgfQogICAgICAgIAogICAgICAgIC5hYnNv bHV0ZSwgLmJveCB7CiAgICAgICAgICAgIHBvc2l0aW9uOiBhYnNvbHV0ZTsKICAgICAgICAgICAg d2lkdGg6IDIwMHB4OwogICAgICAgICAgICBoZWlnaHQ6IDIwMHB4OwogICAgICAgIH0KICAgICAg ICAKICAgICAgICAuYWJzb2x1dGUgewogICAgICAgICAgICBvdmVyZmxvdzogaGlkZGVuOwogICAg ICAgICAgICBsZWZ0OiA0MHB4OwogICAgICAgICAgICB0b3A6IDEwMHB4OwogICAgICAgICAgICBw YWRkaW5nOiAxMHB4OwogICAgICAgICAgICBib3JkZXI6IDFweCBzb2xpZCBibHVlOwogICAgICAg IH0KICAgICAgICAKICAgICAgICAuYm94IHsKICAgICAgICAgICAgd2lkdGg6IDIwMHB4OwogICAg ICAgICAgICBoZWlnaHQ6IDIwMHB4OwogICAgICAgICAgICBiYWNrZ3JvdW5kLWNvbG9yOiBibHVl OwogICAgICAgIH0KICAgICAgICAKICAgIDwvc3R5bGU+CjwvaGVhZD4KPGJvZHk+CgogICAgPGRp diBjbGFzcz0ic2Nyb2xsZXIiPgogICAgICAgIDxkaXYgY2xhc3M9ImNhcmQtY29udGFpbmVyIj4K ICAgICAgICAgICAgPGRpdiBjbGFzcz0iYWJzb2x1dGUiPgogICAgICAgICAgICAgICAgPGRpdiBj bGFzcz0iYm94Ij4KICAgICAgICAgICAgICAgICAgICBib3gKICAgICAgICAgICAgICAgIDwvZGl2 PgogICAgICAgICAgICA8L2Rpdj4KICAgICAgICA8L2Rpdj4KICAgIDwvZGl2PgoKPC9ib2R5Pgo8 L2h0bWw+Cgo=