Not show up 'alert()' or 'confirm()' window

[keibiin-okosuna]

Is there an existing issue for this?

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

CefSharp Version

131.3.50

Operating System

Windows 11

Architecture

x64

.Net Version

.Net Framework 4.8

Implementation

WinForms

Reproduction Steps

Just access any web pages which has a JavaScript popup and push the button which launches popup.

Expected behavior

Get a popup.

Actual behavior

Nothing happened.

Regression?

I guess the problem are from security update on "Chromium" for CVE-2024-7965.
Before CVE-2024-7965, there's no such problem.

Known Workarounds

On JsDialogHandler,

JsDialogHandler.OnJSDialog()
{
suppressMessage=false;
browser.ShowDevTools();
browser.CloseDevTools();
return false;
}
I get popup.

Does this problem also occur in the CEF Sample Application

Not Tested

Other information

Again, I guess the problem are from security update on "Chromium" for CVE-2024-7965.
Before CVE-2024-7965, there's no such problem.

[max3163]

Same problem here, the Workarounds is really weird ....

[amaitland]

With Alloy styled browsers (default), it's up to users to implement their own dialogs via IJsDialogHandler.
This is a bug in CEF when using alloy styled browsers (the default in CefSharp)

If you change to using Chrome styled windows then you should get a default set of dialogs.

#4835 (comment)

It's important to remember that CefSharp is just one of many wrappers around the Chromium Embedded Framework(CEF).

Please read the first few paragraphs of https://github.com/cefsharp/CefSharp/wiki/General-Usage for background

[keibiin-okosuna]

Thank you for your answer, it's just what I wanted to know.

I added CefSharpSettings.RuntimeStyle=RuntimeStyle.Chrome and I got the JavaScript dialogs.

[keibiin-okosuna]

Solved the one problem brings me another problem.

Using Chrome styled solved the JavaScript popup problem, but not allow me to use customized-ContextMenu.

[amaitland]

With Alloy styled browsers (default), it's up to users to implement their own dialogs via IJsDialogHandler.

My mistake, CEF appears to have added native dialogs for JS alerts.

This this is a bug in CEF.

I've created chromiumembedded/cef#3868 you can track progress of this issue there.

[keibiin-okosuna]

I've tried the Ver 132.3.x CefSharp.MinimalExample.net472.

I just compiled and ran it.
It stopped when I tried to open the Javascript popup.

[amaitland]

Testing with cefclient.exe --multi-threaded-message-loop --no-sandbox --use-alloy-style and the CEF Sample Application also crashes, so it's not a CefSharp specific problem.

Switch to Chrome styling would be my suggestion.

[amaitland]

Crash reported at chromiumembedded/cef#3818 (comment)

[keibiin-okosuna]

Switch to Chrome styling would be my suggestion.

It's the best solution for now, I guess.

Using Chrome styled solved the JavaScript popup problem, but not allow me to use customized-ContextMenu.

I've changed my ContextMenu a few and it works fine on Chrome styled.
Thank you for your advice.

[keibiin-okosuna]

I guess It's irrelevant question.
I've tried new version 137.0.1 and noticed, the value of javascript:window.screenY have changed.
The value now is -8 and is incorrect.

[amaitland]

Sounds like a upstream issue.

See https://github.com/cefsharp/CefSharp/blob/master/CONTRIBUTING.md#cefsharp-vs-chromium-embedded-frameworkcef

CEF has it's own issue tracker at https://github.com/chromiumembedded/cef/issues