[Webkit-unassigned] [Bug 229600] New: WKWebView: cannot become first responder using focus() in JavaScript or native becomeFirstResponder() method

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=229600

            Bug ID: 229600
           Summary: WKWebView: cannot become first responder using focus()
                    in JavaScript or native becomeFirstResponder() method
           Product: WebKit
           Version: Safari 14
          Hardware: iPhone / iPad
                OS: iOS 13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML Editing
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dh.chong at outlook.com
                CC: wenson_hsieh at apple.com

For example, if we'd like to build a web based text editor, we'd like to automatically focus on the text input area in `UIViewController.viewDidAppear`.

However, we cannot build behavior like this using public API. For example, all these won't work:

- Calling `htmlElement.focus()` does nothing.
- `WKWebView.becomeFirstResponder()`

The community is trying to explore how to work around this missing feature: https://stackoverflow.com/questions/32449870/programmatically-focus-on-a-form-in-a-webview-wkwebview/48623286#48623286

This can be reproduced on iOS 13 to iOS 15 beta.

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