184251 2018-04-02 17:48:24 -0700 touchmove bound to the document during a touchstart listener is not cancelable (default cannot be prevented) 2023-05-04 13:30:19 -0700 1 1 1 Unclassified WebKit UI Events Safari 11 iPhone / iPad iOS 11 NEW InRadar P2 Normal --- 1 anand.thakker webkit-unassigned ahmad.saleem792 a_protyasha ap bfulgham bugs.webkit.org cdumez david.jerleke dino herr.ernst john.firebaugh mansing.choy oliverzy simon.fraser thorton toby webkit-bug-importer zalan oldest_to_newest 1411322 0 anand.thakker 2018-04-02 17:48:24 -0700 Tested on: iOS 11.2.6, 11.3 Steps to reproduce: 1. Create a script that: - Adds a `touchstart` listener, `onStart`, to some div `myDiv`. - In `onStart`, add a `touchmove` listener, `onMove`, (with `{passive: false}`) to `document`. - In `onMove(e)`, call `e.preventDefault()`. 2. Load the page in iOS 11.2.6 or 11.3 and attempt a scroll from within `myDiv`. Expected result: the page does not scroll. Actual result: the page scrolls. Self-contained example: https://gist.github.com/anandthakker/2d0e71924285a845f0c4e6c5fd966234 1411328 1 anand.thakker 2018-04-02 17:59:07 -0700 It's worth noting that this issue arises amidst an attempt to mitigate the breaking change discussed in https://bugs.webkit.org/show_bug.cgi?id=182521. 1411450 2 webkit-bug-importer 2018-04-03 10:26:59 -0700 <rdar://problem/39145024> 1443307 3 toby 2018-07-18 23:43:27 -0700 Experiencing the same issue on iOS 11.4.1 Full user agent: Mozilla/5.0 (iPad; CPU OS 11_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1 Two workarounds: 1) Register a passive event listener on any non-window/document/body element that the event will bubble though. 2) Register the touchmove event listener outside of the touchstart. 1443360 4 simon.fraser 2018-07-19 08:40:04 -0700 3) register the listener with { passive: false } 1443363 5 toby 2018-07-19 08:44:41 -0700 Hi Simon, the touchmove listener is registered with { passive: false } but unfortunately still experiences the behaviour described in this bug. 1443632 6 toby 2018-07-19 18:10:39 -0700 I also tried registering the touchstart event with {passive: false}, but it didn't fix the problem. 1503330 7 lforschler 2019-02-06 09:19:11 -0800 Mass move bugs into the DOM component. 1898020 8 462297 ahmad.saleem792 2022-09-12 14:51:13 -0700 Created attachment 462297 Testcase (from GitHub with DOCTYPE) 1898023 9 ahmad.saleem792 2022-09-12 14:53:15 -0700 I am not able to reproduce this bug in Safari 16 on iPhone 13 Pro Max (iOS 16) and not able to scroll the page from the body in light green hue area. Appreciate if someone else can confirm as well because I am not too sure on my testing with this test case. Thanks! 1952980 10 david.jerleke 2023-05-04 12:55:21 -0700 Experiencing the same problem on iOS 16.4.1. If I try to scroll the page on the light green area, the page scrolls but only sometimes. It’s inconsistent in other words. The easiest way for me to reproduce the bug was to repeatedly do swipe gestures in one direction inside the green area. Eventually, one of the swipe gestures will scroll the page even though it shouldn’t. 462297 2022-09-12 14:51:13 -0700 2022-09-12 14:51:13 -0700 Testcase (from GitHub with DOCTYPE) Test Case - Webkit 184251.html text/html 2530 ahmad.saleem792 PCFET0NUWVBFIGh0bWw+CjxodG1sPgogICAgPGhlYWQ+CiAgICAgICAgPG1ldGEgbmFtZT0idmll d3BvcnQiIGNvbnRlbnQ9IndpZHRoPWRldmljZS13aWR0aCwgaW5pdGlhbC1zY2FsZT0xIj4KICAg IDwvaGVhZD4KICAgIDxib2R5PgogICAgICAgIDxkaXYgaWQ9IndpZGdldCIgc3R5bGU9IndpZHRo OiAxMDAlOyBoZWlnaHQ6IDMwMHB4OyBiYWNrZ3JvdW5kLWNvbG9yOiAjYWFjY2NjIj5JdCBzaG91 bGQgbm90IGJlIHBvc3NpYmxlIHRvIGluaXRpYXRlIGEgcGFnZSBzY3JvbGwgZnJvbSB3aXRoaW4g dGhpcyBlbGVtZW50PC9kaXY+CiAgICAgICAgPGRpdiBzdHlsZT0id2lkdGg6IDEwMCU7IGhlaWdo dDogNTBweDsgYmFja2dyb3VuZC1jb2xvcjogI2NjYyI+PC9kaXY+CiAgICAgICAgPGRpdiBzdHls ZT0id2lkdGg6IDEwMCU7IGhlaWdodDogNTBweDsgYmFja2dyb3VuZC1jb2xvcjogI2ZmZiI+PC9k aXY+CiAgICAgICAgPGRpdiBzdHlsZT0id2lkdGg6IDEwMCU7IGhlaWdodDogNTBweDsgYmFja2dy b3VuZC1jb2xvcjogI2NjYyI+PC9kaXY+CiAgICAgICAgPGRpdiBzdHlsZT0id2lkdGg6IDEwMCU7 IGhlaWdodDogNTBweDsgYmFja2dyb3VuZC1jb2xvcjogI2ZmZiI+PC9kaXY+CiAgICAgICAgPGRp diBzdHlsZT0id2lkdGg6IDEwMCU7IGhlaWdodDogNTBweDsgYmFja2dyb3VuZC1jb2xvcjogI2Nj YyI+PC9kaXY+CiAgICAgICAgPGRpdiBzdHlsZT0id2lkdGg6IDEwMCU7IGhlaWdodDogNTBweDsg YmFja2dyb3VuZC1jb2xvcjogI2ZmZiI+PC9kaXY+CiAgICAgICAgPGRpdiBzdHlsZT0id2lkdGg6 IDEwMCU7IGhlaWdodDogNTBweDsgYmFja2dyb3VuZC1jb2xvcjogI2NjYyI+PC9kaXY+CiAgICAg ICAgPGRpdiBzdHlsZT0id2lkdGg6IDEwMCU7IGhlaWdodDogNTBweDsgYmFja2dyb3VuZC1jb2xv cjogI2ZmZiI+PC9kaXY+CiAgICAgICAgPGRpdiBzdHlsZT0id2lkdGg6IDEwMCU7IGhlaWdodDog NTBweDsgYmFja2dyb3VuZC1jb2xvcjogI2NjYyI+PC9kaXY+CiAgICAgICAgPHNjcmlwdD4KICAg ICAgICAgICAgY29uc3QgZGl2ID0gZG9jdW1lbnQuZ2V0RWxlbWVudEJ5SWQoJ3dpZGdldCcpOwoK ICAgICAgICAgICAgZGl2LmFkZEV2ZW50TGlzdGVuZXIoJ3RvdWNoc3RhcnQnLCBmdW5jdGlvbiAo KSB7CiAgICAgICAgICAgICAgICBjb25zb2xlLmxvZygnZGl2IHRvdWNoc3RhcnQnKQogICAgICAg ICAgICAgICAgYmluZERvY3VtZW50SGFuZGxlcigpOwogICAgICAgICAgICB9LCB7cGFzc2l2ZTog dHJ1ZX0pCgogICAgICAgICAgICBmdW5jdGlvbiBvbk1vdmUoZSkgewogICAgICAgICAgICAgICAg Y29uc3QgY2FuY2VsYWJsZSA9IGUuY2FuY2VsYWJsZTsKICAgICAgICAgICAgICAgIGUucHJldmVu dERlZmF1bHQoKTsKICAgICAgICAgICAgICAgIGNvbnN0IGRlZmF1bHRQcmV2ZW50ZWQgPSBlLmRl ZmF1bHRQcmV2ZW50ZWQ7CiAgICAgICAgICAgICAgICBjb25zb2xlLmxvZyhgZG9jdW1lbnQgJHtl LnR5cGV9YCwge2NhbmNlbGFibGUsIGRlZmF1bHRQcmV2ZW50ZWR9KTsKICAgICAgICAgICAgfQoK ICAgICAgICAgICAgZnVuY3Rpb24gYmluZERvY3VtZW50SGFuZGxlcigpIHsKICAgICAgICAgICAg ICAgIGNvbnNvbGUubG9nKCdCaW5kIGRvY3VtZW50IGhhbmRsZXJzJyk7CiAgICAgICAgICAgICAg ICB3aW5kb3cuZG9jdW1lbnQuYWRkRXZlbnRMaXN0ZW5lcigndG91Y2htb3ZlJywgb25Nb3ZlLCB7 cGFzc2l2ZTogZmFsc2V9KTsKICAgICAgICAgICAgICAgIHdpbmRvdy5kb2N1bWVudC5hZGRFdmVu dExpc3RlbmVyKCd0b3VjaGVuZCcsICgpID0+IHsKCiAgICAgICAgICAgICAgICAgICAgd2luZG93 LmRvY3VtZW50LnJlbW92ZUV2ZW50TGlzdGVuZXIoJ3RvdWNobW92ZScsIG9uTW92ZSwge3Bhc3Np dmU6IGZhbHNlfSk7CiAgICAgICAgICAgICAgICB9KTsKICAgICAgICAgICAgfQoKICAgICAgICAg ICAgLy8gVGhlIGFib3ZlIGNvZGUgc2hvdWxkIGJlIHN1ZmZpY2llbnQgdG8gcHJldmVudCBzY3Jv bGxpbmcKICAgICAgICAgICAgLy8gaW5pdGlhdGVkIGZyb20gd2l0aGluICN3aWRnZXQsIGJ1dCBp dCdzIG5vdC4gIEluIG9yZGVyIHRvIG1ha2UgaXQKICAgICAgICAgICAgLy8gd29yaywgd2UgaGF2 ZSB0byBlaXRoZXIgYmluZCB0aGUgZm9sbG93aW5nIG5vbi1wYXNzaXZlIGhhbmRsZXI6CgogICAg ICAgICAgICAvLyBkaXYuYWRkRXZlbnRMaXN0ZW5lcigndG91Y2htb3ZlJywgZnVuY3Rpb24gKCkg ewogICAgICAgICAgICAvLyAgICAgY29uc29sZS5sb2coJ2RpdiB0b3VjaG1vdmUgLSBwYXNzaXZl OiBmYWxzZScpCiAgICAgICAgICAgIC8vIH0sIHtwYXNzaXZlOiBmYWxzZX0pOwoKICAgICAgICAg ICAgLy8gb3IgZWxzZSBjYWxsIGBiaW5kRG9jdW1lbnRIYW5kbGVycygpYCBkaXJlY3RseSAoaW5z dGVhZCBvZgogICAgICAgICAgICAvLyB3aXRoaW4gdGhlIHRvdWNoc3RhcnQgaGFuZGxlciBhYm92 ZToKCiAgICAgICAgICAgIC8vIGJpbmREb2N1bWVudEhhbmRsZXIoKTsKICAgICAgICA8L3Njcmlw dD4KICAgIDwvYm9keT4KPC9odG1sPg==