Blazor WebAssembly debugger cannot launch an Edge version other than stable

[DL444]

Describe the bug

Blazor WebAssembly debugger cannot launch an Edge version other than stable because the launch.json config for blazorwasm does not support runtimeExecutable property.

When you try to launch the debugger, the following message is shown:

Unable to launch browser: "Unable to find Edge version stable. Available auto-discovered versions are: ["dev"]. You can set the "runtimeExecutable" in your launch.json to one of these, or provide an absolute path to the browser executable."

Adding runtimeExecutable in launch.json results in VSC reporting the following error, and the problem is not mitigated.

Property runtimeExecutable is not allowed.

To Reproduce

On a machine with dev/canary and no stable version of Microsoft Edge:

1. Create a ASP.NET Blazor WebAssembly project and open it in VSC. Or use this repro repo and skip to step 3.

2. Create the default Blazor WebAssembly run task, which can be something like this:

   {
       "name": "Launch and Debug Standalone Blazor WebAssembly App",
       "type": "blazorwasm",
       "request": "launch",
       "cwd": "${workspaceFolder}",
       "browser": "edge"
   }

3. Start the debugger from VSC.

4. The web app starts but browser does not launch. The error message shows up a while later.

Further technical details

• ASP.NET Core version: 5.0
• Output of dotnet --info:

.NET SDK (reflecting any global.json):
 Version:   5.0.102
 Commit:    71365b4d42

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  11.0
 OS Platform: Darwin
 RID:         osx.11.0-x64
 Base Path:   /usr/local/share/dotnet/sdk/5.0.102/

Host (useful for support):
  Version: 5.0.2
  Commit:  cb5f173b96

.NET SDKs installed:
  3.1.403 [/usr/local/share/dotnet/sdk]
  3.1.404 [/usr/local/share/dotnet/sdk]
  3.1.405 [/usr/local/share/dotnet/sdk]
  5.0.101 [/usr/local/share/dotnet/sdk]
  5.0.102 [/usr/local/share/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 3.1.9 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.10 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.11 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.1.23 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.9 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.10 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.11 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.1 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.2 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

• IDE: Visual Studio Code 1.54.1

[captainsafia]

@DL444 You can try passing the runtimeExecutable under the browserConfig property like so:

{
  "browserConfig": {
    "runtimeExecutable": "foo"
  }
}

[DL444]

@captainsafia Unfortunately browserConfig doesn't seem to be an accepted property as well.

[captainsafia]

@DL444 Can you share your entire launch.json? The snippet you shared seems to indicate that the config was included in a coreclr debug type which isn't valid.

[DL444]

@captainsafia
Sure, here it is. I do have to admit that this is edited from an existing configuration.

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Backend",
            "type": "coreclr",
            "request": "launch",
            "preLaunchTask": "Build Backend",
            "program": "${workspaceFolder}/Solution.Backend/bin/Debug/net5.0/Solution.Backend.dll",
            "args": [],
            "cwd": "${workspaceFolder}/Solution.Backend",
            "console": "internalConsole",
            "stopAtEntry": false
        },
        {
            "name": "Frontend",
            "type": "blazorwasm",
            "request": "launch",
            "preLaunchTask": "Build Frontend",
            "program": "${workspaceFolder}/Solution.Web/bin/Debug/net5.0/Solution.Web.dll",
            "cwd": "${workspaceFolder}/Solution.Web",
            "serverReadyAction": {
                "action": "openExternally",
                "pattern": "\\bNow listening on:\\s+(https?://\\S+)"
            },
            "browser": "edge",
            "runtimeExecutable": "dev",
            "browserConfig": {
                "runtimeExecutable": "dev"
            },
            "env": {
                "ASPNETCORE_ENVIRONMENT": "Development"
            }
        },
        {
            "name": ".NET Core Attach",
            "type": "coreclr",
            "request": "attach",
            "processId": "${command:pickProcess}"
        }
    ]
}

However, this configuration also generates the same warning. This one is generated by VSC from scratch.

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch and Debug Standalone Blazor WebAssembly App",
            "type": "blazorwasm",
            "request": "launch",
            "cwd": "${workspaceFolder}",
            "browser": "edge",
            "runtimeExecutable": "dev",
            "browserConfig": {
                "runtimeExecutable": "dev"
            }
        }
    ]
}

[ghost]

This issue has been resolved and has not had any activity for 1 day. It will be closed for housekeeping purposes.

See our Issue Management Policies for more information.