199977 2019-07-19 23:48:21 -0700 touch-action on <canvas> has no effect 2019-08-12 02:51:30 -0700 1 1 1 Unclassified WebKit UI Events WebKit Nightly Build Unspecified Unspecified RESOLVED DUPLICATE 200205 InRadar P2 Normal --- 1 graouts webkit-unassigned ap koivisto webkit-bug-importer oldest_to_newest 1554471 0 374543 graouts 2019-07-19 23:48:21 -0700 Created attachment 374543 Test See the attached layout test which simply sets "touch-action: none" on a lone <canvas> element under the body. If I run this test I get this output: (GraphicsLayer (anchor 0.00 0.00) (bounds 800.00 600.00) (children 1 (GraphicsLayer (bounds 800.00 600.00) (contentsOpaque 1) (drawsContent 1) (backgroundColor #FFFFFF) (event region (rect (0,0) width=800 height=600) ) ) ) ) Now, if I change the <canvas> to a <div>, I get: (GraphicsLayer (anchor 0.00 0.00) (bounds 800.00 600.00) (children 1 (GraphicsLayer (bounds 800.00 600.00) (contentsOpaque 1) (drawsContent 1) (backgroundColor #FFFFFF) (event region (rect (0,0) width=800 height=600) (touch-action (none (rect (8,8) width=100 height=100) ) ) ) ) ) ) Something is wrong with <canvas> elements and touch-action. 1554472 1 graouts 2019-07-19 23:48:58 -0700 <rdar://problem/53331224> 1560372 2 graouts 2019-08-12 02:51:30 -0700 *** This bug has been marked as a duplicate of bug 200205 *** 374543 2019-07-19 23:48:21 -0700 2019-07-19 23:48:21 -0700 Test touch-action-region-canvas.html text/html 482 graouts PGh0bWw+CjxzdHlsZT4KICAgIGNhbnZhcyB7CiAgICAgICAgdG91Y2gtYWN0aW9uOiBub25lOwog ICAgICAgIHdpZHRoOiAxMDBweDsKICAgICAgICBoZWlnaHQ6IDEwMHB4OwogICAgfQo8L3N0eWxl Pgo8c2NyaXB0Pgp3aW5kb3cub25sb2FkID0gZnVuY3Rpb24gKCkgewogICAgaWYgKHdpbmRvdy50 ZXN0UnVubmVyKQogICAgICAgIHRlc3RSdW5uZXIuZHVtcEFzVGV4dCgpOwogICAgaWYgKHdpbmRv dy5pbnRlcm5hbHMpCiAgICAgICAgcmVzdWx0cy5pbm5lclRleHQgPSBpbnRlcm5hbHMubGF5ZXJU cmVlQXNUZXh0KGRvY3VtZW50LCBpbnRlcm5hbHMuTEFZRVJfVFJFRV9JTkNMVURFU19FVkVOVF9S RUdJT04gfCBpbnRlcm5hbHMuTEFZRVJfVFJFRV9JTkNMVURFU19ST09UX0xBWUVSX1BST1BFUlRJ RVMpOwp9Cjwvc2NyaXB0Pgo8Ym9keT4KPGNhbnZhcz48L2NhbnZhcz4KPHByZSBpZD0icmVzdWx0 cyI+PC9wcmU+CjwvYm9keT4KPC9odG1sPgo=