RESOLVED CONFIGURATION CHANGED198737
The whole viewport shifts down when calling focus() on a contenteditable which may be focused natively 
https://bugs.webkit.org/show_bug.cgi?id=198737
Summary The whole viewport shifts down when calling focus() on a contenteditable whic...
Xidorn Quan
Reported 2019-06-10 17:59:46 PDT
Created attachment 371800 [details] testcase Steps to reproduce: 1. open the testcase on iPhone 2. click the rectangle on the bottom Expected result: The viewport should shift up and put the rectangle input in the view Actual result: The viewport briefly shifts down a lot, and then shifts back, but at the end, the rectangle is out of view. Based on experiment with Simulator, it seems to be significant when software keyboard is triggered. If you use Simulator, and enable "Slow Animations" in Debug menu, you would see that the whole viewport shifts down a lot and slowly moves up. I tested on a real iOS 12 device as well as Simulator.
Attachments
testcase (532 bytes, text/html)
2019-06-10 17:59 PDT, Xidorn Quan 		no flags
Details
screencast (233.77 KB, video/mp4)
2019-06-10 19:53 PDT, Xidorn Quan 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Xidorn Quan
Comment 1 2019-06-10 18:15:01 PDT
It seems to also happen when the contenteditable is newly created and a focus() follows closely. In this case, if you don't call focus() the new input wouldn't be focused natively.
Xidorn Quan
Comment 2 2019-06-10 19:53:56 PDT
Created attachment 371813 [details] screencast FWIW, this is what happens (with slow animations enabled) in our production.
Radar WebKit Bug Importer
Comment 3 2019-06-11 00:57:36 PDT
<rdar://problem/51614063>
Wenson Hsieh
Comment 4 2019-06-11 07:25:47 PDT
This doesn’t appear to reproduce anymore on iOS 13.
Ryosuke Niwa
Comment 5 2019-06-25 13:28:26 PDT
Xidorn, please verify that this is fixed in iOS 13 betas, and reopen the bug if you still the issue.
Xidorn Quan
Comment 6 2019-06-26 17:25:30 PDT
Yep, it doesn't seem to happen anymore on iOS 13 beta. Thanks.
Ryosuke Niwa
Comment 7 2019-06-26 19:04:45 PDT
(In reply to Xidorn Quan from comment #6) > Yep, it doesn't seem to happen anymore on iOS 13 beta. Thanks. Great. Thanks for verifying!
Xidorn Quan
Comment 8 2019-07-10 16:38:44 PDT
Submitted a new bug 199691 which is probably one of the root cause of this bug, and it happens on iOS 13 beta as well.
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