MicrosoftEdge
WebView does not display the content in ~5% of runs
Description Hi! I use Fixed Version WebView in Win32 application. It usually works fine. But in ~5% of application runs, the WebView does not display the content. Usually, 8 msedgewebview2.exe processes are created on the system to service WebView control. But in those 5% of cases when the WebView content is not displayed, there are only 4 or 5 processes. Crashpad\reports is empty. Event Log is empty. ProcessFailed event does not happen.
What could be the problem? Are there any tools for debugging?
Usage sample:
auto options = Make<CoreWebView2EnvironmentOptions>();
checkHRESULT( options->put_AdditionalBrowserArguments( L"--disable-features=msSmartScreenProtection" ) );
checkHRESULT( CreateCoreWebView2EnvironmentWithOptions( runtimePath, userDataPath, options.Get(),
Callback<ICoreWebView2CreateCoreWebView2EnvironmentCompletedHandler>( this, &CWebView::OnCreateEnvironmentCompleted ).Get() ) );
// Pseudo-synchronous creation https://github.com/MicrosoftEdge/WebView2Feedback/issues/740
while( webviewWindow == nullptr && ::WaitMessage() ) {
CMessageLoop::PumpMessages( 0, WM_USER + 1, WM_USER + 1 );
}
checkHRESULT( webviewWindow->add_ProcessFailed(
Callback<ICoreWebView2ProcessFailedEventHandler>( this, &CWebView::OnProcessFailed ).Get(), &processFailedToken ) );
CComPtr<ICoreWebView2Settings> settings;
checkHRESULT( webviewWindow->get_Settings( &settings ) );
checkHRESULT( settings->put_IsZoomControlEnabled( FALSE ) );
checkHRESULT( settings->put_IsStatusBarEnabled( FALSE ) );
checkHRESULT( settings->put_AreDefaultContextMenusEnabled( FALSE ) );
checkHRESULT( settings->put_AreDevToolsEnabled( FALSE ) );
checkHRESULT( controller->put_Bounds( rect ) );
checkHRESULT( webviewWindow->Navigate( url ) );
Version SDK: 1.0.1020.30 Runtime: 95.0.1020.53 Framework: Win32 OS: Win10
Hey @DmitryKorepanov - the biggest thing that jumps out is the message pump to try and achieve synchronous initialization. In the cases where nothing shows up, can you confirm that it gets past the message pump?
Yes, the execution goes through message pump loop and application does not freeze. Webview looks as if it was forgotten to show.