text input Autofocus not works in winforms

[I-Iege]

Is there an existing issue for this?

• I have searched both open/closed issues, no issue already exists.

CefSharp Version

129.0.110

Operating System

Windows 11

Architecture

x64

.Net Version

.Net 6.0

Implementation

WinForms

Reproduction Steps

1. We have a page with text input which set to focus on page load.
2. open the url with sefsharp winform example browser

Expected behavior

The text input is in fully focused, it is possible to type text after the page loaded.

Actual behavior

The text input has focused style, but has no caret not possible to type.

Regression?

No response

Known Workarounds

No response

Does this problem also occur in the CEF Sample Application

Yes using WPF/OffScreen command line args

Other information

the text input is HTMLInputElement
the page build with node 22.9.0
we have :
"@types/react-dom": "^17.0.11",
"react-dom": "^17.0.2",

[dbuechel]

We have actually just recently stumbled upon this as well, the input focus used to work fine for us using the Windows Forms control when manually focusing the IBrowserHost: SafeExamBrowser/seb-win-refactoring@40d2709.

if (control.IsBrowserInitialized)
{
	control.BrowserCore.GetHost().SetFocus(true);
}

This however appears to have stopped working as it appears.

[dbuechel]

I was just able to resolve the issue using a custom focus handler: SafeExamBrowser/seb-win-refactoring@e8ebb21. It may however be that the default handler still has a bug, as the input focus indeed was not working anymore as explained above.