dotnet / dotnet/aspnetcore

[Blazor] Enable debugging for Blazor WebAssembly apps launched from Aspire dashboard

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#64,891 3 comments 6 reactions 1 assignee Claimed by @maraf View on GitHub
area-blazor on-roadmap
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Description

## Description

When launching a Blazor WebAssembly application through the .NET Aspire dashboard, there's currently no way to attach a debugger to the browser process. Unlike launching directly from Visual Studio or via `dotnet run`, the Aspire dashboard launches the app by opening a URL in the default browser without the necessary debugging flags.

## Current Behavior

- Aspire dashboard provides a clickable link that opens the app in the default browser
- No debugging capabilities are available
- Developers must manually restart the browser with remote debugging flags to debug

## Expected Behavior

The Aspire dashboard should provide an option to:
1. Launch the Blazor WebAssembly app with debugging enabled
2. Automatically configure the browser with appropriate debugging flags (e.g., `--remote-debugging-port=9222`)
3. Allow seamless debugging experience similar to F5 debugging in Visual Studio

## Possible Solutions

1. **Add a "Debug" button** next to the app URL in the dashboard that launches the browser with debugging enabled
2. **Provide launch settings integration** that respects debugging configuration from launchSettings.json
3. **Automatic debugger attachment** when the app is launched in debug mode via Aspire

## Additional Context

This is particularly important for:
- Developers working with Aspire-orchestrated applications
- Teams debugging complex multi-project solutions
- Testing debugging scenarios in containerized environments

## Related Issues

- Part of improving Aspire developer experience
- Related to general Blazor WebAssembly debugging workflows

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