[Webkit-unassigned] [Bug 258415] New: REGRESSION (iOS 17 beta): Custom UITextField / inputView broken on WKWebView form elements

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=258415

            Bug ID: 258415
           Summary: REGRESSION (iOS 17 beta): Custom UITextField /
                    inputView broken on WKWebView form elements
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Forms
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ajuma at chromium.org
                CC: cdumez at apple.com, justincohen at google.com,
                    wenson_hsieh at apple.com

Created attachment 466800

  --> https://bugs.webkit.org/attachment.cgi?id=466800&action=review

Sample project

Steps to reproduce (also see the attached sample project):
1. Setup a WKWebView to use a UITableView as its inputView.
2. Open a web form with multiple fields. The sample project uses https://rsolomakhin.github.io/autofill/ but any html form with multiple inputs will work.
3. Tap on a field to trigger the inputView on the WKWebView.
4. Navigate between fields using the input accessory view.

Expected behavior:
The UITableView is visible at all times as the inputView of the WKWebView.

Actual behavior:
The UITableView is displayed the first time a field is focused but disappears when navigating to the next field, then it's visible again, and so on. This is breaking the autofill UI in Chrome on iOS.

It's unclear if this is a WebKit bug (e.g., a regression from bug 254236) or a bug in UIKit, given the large changes in iOS17 pulling the keyboard out-of-process.

This bug is also filed as FB12419714.

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