[Windows] WebView2 not handling DOM events properly

[sreiss]

Description

Starting from MAUI 8.0.14 and WindowsAppSDK 1.4.240211001, DOM events fired inside WebView2 are not handled properly, making the use of custom select boxes (for instance) impossible.

Steps to Reproduce

1. Click on the app selector icon.
2. Click on any link to be redirected to any Google app.
3. The menu closes and the navigation is not done.
4. What should have happenend : the navigation to the selected Google app should have been done.

This has been happening since 8.0.14, but still is an issue in 8.0.40. To check this sample against 8.0.40, please update the csproj package references like so:

<PackageReference Include="Microsoft.Maui.Controls" Version="8.0.40" />
<PackageReference Include="Microsoft.Maui.Controls.Compatibility" Version="8.0.40" />
<PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="8.0.0" />
<PackageReference Include="Microsoft.WindowsAppSDK" Version="1.5.240311000" />

Link to public reproduction project repository

https://github.com/sreiss/maui-8.0.14-webview-events-issue/tree/main

Version with bug

8.0.14 SR3.1

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

8.0.7 SR2

Affected platforms

Windows

Affected platform versions

Microsoft.WindowsAppSDK 1.4.240211001 to 1.5.240311000

Did you find any workaround?

No response

Relevant log output

No response

[github-actions]

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[ninachen03]

Verified this issue with Visual Studio 17.11.0 Preview 1.0 ( 8.0.40 & 8.0.7 )

[jsuarezruiz]

Verified on main branch too.

[BenBtg]

This need to be tagged as a XamCat issue.

[Foda]

Hello! I just confirmed that this is an issue with Webview2 and not MAUI. I've filed a bug for this here: MicrosoftEdge/WebView2Feedback#4598

[sreiss]

Hi,

After checking the sample against https://www.nuget.org/packages/Microsoft.WindowsAppSDK/1.6.240531000-experimental1, I can confirm that the issue is solved by this version of the WindowsAppSDK. Waiting for the integration in MAUI to fix the issue.

To check against this sample, in the csproj, replace:

<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net8.0-windows10.0.19041.0</TargetFrameworks>

by

<TargetFrameworks Condition="$([MSBuild]::IsOSPlatform('windows'))">$(TargetFrameworks);net8.0-windows10.0.22621.0</TargetFrameworks>
<TargetPlatformMinVersion>10.0.17763.0</TargetPlatformMinVersion>
<WindowsSdkPackageVersion>10.0.22621.35-preview</WindowsSdkPackageVersion>

And reference the experimental package (if using VS 2022, don't forget to enable Nuget prerelease versions):

<PackageReference Include="Microsoft.WindowsAppSDK" Version="1.6.240531000-experimental1" />

[ITaluone]

Any chance this fix is included into MAUI before .NET9?

[MartyIX]

Should be fixed by #24266.