The Popup window Page didn't loaded

[ArunPandianRNT]

Is there an existing issue for this?

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

CefSharp Version

135.0.220.0

Operating System

Windows 11

Architecture

AnyCPU

.Net Version

.NET 4.8

Implementation

WPF

Reproduction Steps

Load a webpage that includes a window.open() call or .

Observe that:

The popup may not appear at all.

If it appears, it may render blank or crash.

DevTools or modal dialogs may behave inconsistently.

Expected behavior

Popup windows should open in a new ChromiumWebBrowser instance or new WPF window.
The content should render as expected.

Actual behavior

Popup windows are either:

Not opening at all.

Appearing with no content.

Causing UI freezes or crashes.

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

No response

[amaitland]

Converting to discussion as this is fairly unlikely a bug in CefSharp directly.

135.0.220.0

Please confirm your issue reproduces with the current supported version, M136 at time of writing.

Load a webpage that includes a window.open()

Testing with https://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_win_open using https://github.com/cefsharp/CefSharp.MinimalExample and it behaves as expected.

If it appears, it may render blank or crash.

You should check the log file for errors.

Expected behavior
Popup windows should open in a new ChromiumWebBrowser instance or new WPF window. The content should render as expected.

The default expected behavior would be to open in a new native window.

Does this problem also occur in the CEF Sample Application
Yes using WPF/OffScreen command line args

Did you actually test with the CEF Sample application? If not then please do so.