dotnet · tmat · May 19, 2025 · May 13, 2025 · May 13, 2025 · May 13, 2025
diff --git a/src/BuiltInTools/dotnet-watch/Browser/BrowserConnector.cs b/src/BuiltInTools/dotnet-watch/Browser/BrowserConnector.cs
@@ -287,7 +287,8 @@ public bool IsServerSupported(ProjectGraphNode projectNode)
                 return false;
             }
 
-            if (!IsWebApp(projectNode))
+            // We only want to enable browser refresh if this is a WebApp (ASP.NET Core / Blazor app).
+            if (!projectNode.IsWebApp())
             {
                 context.Reporter.Verbose("Skipping configuring browser-refresh middleware since this is not a webapp.");
                 return false;
@@ -297,10 +298,6 @@ public bool IsServerSupported(ProjectGraphNode projectNode)
             return true;
         }
 
-        // We only want to enable browser refresh if this is a WebApp (ASP.NET Core / Blazor app).
-        private static bool IsWebApp(ProjectGraphNode projectNode)
-            => projectNode.GetCapabilities().Any(value => value is "AspNetCore" or "WebAssembly");
-
         private LaunchSettingsProfile GetLaunchProfile(ProjectOptions projectOptions)
         {
             var projectDirectory = Path.GetDirectoryName(projectOptions.ProjectPath);

diff --git a/src/BuiltInTools/dotnet-watch/HotReload/CompilationHandler.cs b/src/BuiltInTools/dotnet-watch/HotReload/CompilationHandler.cs
@@ -105,8 +105,8 @@ public async ValueTask StartSessionAsync(CancellationToken cancellationToken)
         private static DeltaApplier CreateDeltaApplier(HotReloadProfile profile, ProjectGraphNode project, BrowserRefreshServer? browserRefreshServer, IReporter processReporter)
             => profile switch
             {
-                HotReloadProfile.BlazorWebAssembly => new BlazorWebAssemblyDeltaApplier(processReporter, browserRefreshServer!, project),
-                HotReloadProfile.BlazorHosted => new BlazorWebAssemblyHostedDeltaApplier(processReporter, browserRefreshServer!, project),
+                HotReloadProfile.BlazorWebAssembly => new BlazorWebAssemblyDeltaApplier(processReporter, browserRefreshServer ?? throw new InvalidOperationException(), project),
+                HotReloadProfile.BlazorHosted => new BlazorWebAssemblyHostedDeltaApplier(processReporter, browserRefreshServer ?? throw new InvalidOperationException(), project),
                 _ => new DefaultDeltaApplier(processReporter),
             };
 

diff --git a/src/BuiltInTools/dotnet-watch/HotReload/HotReloadProfileReader.cs b/src/BuiltInTools/dotnet-watch/HotReload/HotReloadProfileReader.cs
@@ -11,44 +11,48 @@ internal static class HotReloadProfileReader
     {
         public static HotReloadProfile InferHotReloadProfile(ProjectGraphNode projectNode, IReporter reporter)
         {
-            var queue = new Queue<ProjectGraphNode>();
-            queue.Enqueue(projectNode);
-
-            ProjectInstance? aspnetCoreProject = null;
+            if (projectNode.IsWebApp())
+            {
+                var queue = new Queue<ProjectGraphNode>();
+                queue.Enqueue(projectNode);
 
-            var visited = new HashSet<ProjectGraphNode>();
+                ProjectInstance? aspnetCoreProject = null;
 
-            while (queue.Count > 0)
-            {
-                var currentNode = queue.Dequeue();
-                var projectCapability = currentNode.ProjectInstance.GetItems("ProjectCapability");
+                var visited = new HashSet<ProjectGraphNode>();
 
-                foreach (var item in projectCapability)
+                while (queue.Count > 0)
                 {
-                    if (item.EvaluatedInclude == "AspNetCore")
-                    {
-                        aspnetCoreProject = currentNode.ProjectInstance;
-                        break;
-                    }
-                    else if (item.EvaluatedInclude == "WebAssembly")
+                    var currentNode = queue.Dequeue();
+                    var projectCapability = currentNode.ProjectInstance.GetItems("ProjectCapability");
+
+                    foreach (var item in projectCapability)
                     {
-                        // We saw a previous project that was AspNetCore. This must he a blazor hosted app.
-                        if (aspnetCoreProject is not null && aspnetCoreProject != currentNode.ProjectInstance)
+                        if (item.EvaluatedInclude == "AspNetCore")
                         {
-                            reporter.Verbose($"HotReloadProfile: BlazorHosted. {aspnetCoreProject.FullPath} references BlazorWebAssembly project {currentNode.ProjectInstance.FullPath}.", emoji: "🔥");
-                            return HotReloadProfile.BlazorHosted;
+                            aspnetCoreProject = currentNode.ProjectInstance;
+                            break;
                         }
 
-                        reporter.Verbose("HotReloadProfile: BlazorWebAssembly.", emoji: "🔥");
-                        return HotReloadProfile.BlazorWebAssembly;
+                        if (item.EvaluatedInclude == "WebAssembly")
+                        {
+                            // We saw a previous project that was AspNetCore. This must he a blazor hosted app.
+                            if (aspnetCoreProject is not null && aspnetCoreProject != currentNode.ProjectInstance)
+                            {
+                                reporter.Verbose($"HotReloadProfile: BlazorHosted. {aspnetCoreProject.FullPath} references BlazorWebAssembly project {currentNode.ProjectInstance.FullPath}.", emoji: "🔥");
+                                return HotReloadProfile.BlazorHosted;
+                            }
+
+                            reporter.Verbose("HotReloadProfile: BlazorWebAssembly.", emoji: "🔥");
+                            return HotReloadProfile.BlazorWebAssembly;
+                        }
                     }
-                }
 
-                foreach (var project in currentNode.ProjectReferences)
-                {
-                    if (visited.Add(project))
+                    foreach (var project in currentNode.ProjectReferences)
                     {
-                        queue.Enqueue(project);
+                        if (visited.Add(project))
+                        {
+                            queue.Enqueue(project);
+                        }
                     }
                 }
             }

diff --git a/src/BuiltInTools/dotnet-watch/Utilities/ProjectGraphNodeExtensions.cs b/src/BuiltInTools/dotnet-watch/Utilities/ProjectGraphNodeExtensions.cs
@@ -33,6 +33,9 @@ public static bool IsNetCoreApp(this ProjectGraphNode projectNode)
     public static bool IsNetCoreApp(this ProjectGraphNode projectNode, Version minVersion)
         => IsNetCoreApp(projectNode) && IsTargetFrameworkVersionOrNewer(projectNode, minVersion);
 
+    public static bool IsWebApp(this ProjectGraphNode projectNode)
+        => projectNode.GetCapabilities().Any(static value => value is "AspNetCore" or "WebAssembly");
+
     public static string? GetOutputDirectory(this ProjectGraphNode projectNode)
         => projectNode.ProjectInstance.GetPropertyValue("TargetPath") is { Length: >0 } path ? Path.GetDirectoryName(Path.Combine(projectNode.ProjectInstance.Directory, path)) : null;
 

@@ -6,11 +6,11 @@
     <TargetFramework>$(CurrentTargetFramework)</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <IsAspireHost>true</IsAspireHost>
-    <UserSecretsId>ad800ccc-954c-40cc-920b-2e09fc9eee7a</UserSecretsId>
   </PropertyGroup>
 
   <ItemGroup>
     <ProjectReference Include="..\WatchAspire.ApiService\WatchAspire.ApiService.csproj" Watch="true" />
+    <ProjectReference Include="..\WatchAspire.Wasm\WatchAspire.Wasm.csproj" Watch="true" />
   </ItemGroup>
 
   <ItemGroup>

@@ -0,0 +1,8 @@
+<Router AppAssembly="@typeof(Program).Assembly" PreferExactMatches="true">
+    <Found Context="routeData">
+        <RouteView RouteData="@routeData"/>
+    </Found>
+    <NotFound>
+        <p>Sorry, there's nothing at this address.</p>
+    </NotFound>
+</Router>
@@ -0,0 +1,5 @@
+@page "/"
+
+<h1>Hello, world!</h1>
+
+Welcome to your new app.
@@ -0,0 +1,11 @@
+using System;
+
+namespace standalone
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+        }
+    }
+}
@@ -0,0 +1,13 @@
+{
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": "true",
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5000",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}
@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk.BlazorWebAssembly">
+
+  <PropertyGroup>
+    <TargetFramework>$(CurrentTargetFramework)</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="$(MicrosoftAspNetCoreAppRefPackageVersion)" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="$(MicrosoftAspNetCoreAppRefPackageVersion)" PrivateAssets="all" />
+  </ItemGroup>
+
+</Project>
@@ -0,0 +1,2 @@
+@using Microsoft.AspNetCore.Components.Routing
+@using standalone
@@ -0,0 +1 @@
+.build { }
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width" />
+    <title>standalone</title>
+    <base href="/" />
+    <link href="css/bootstrap/bootstrap.min.css" rel="stylesheet" />
+    <link href="css/app.css" rel="stylesheet" />
+</head>
+
+<body>
+    <app>Loading...</app>
+
+    <div id="blazor-error-ui">
+        An unhandled error has occurred.
+        <a href="" class="reload">Reload</a>
+        <a class="dismiss">🗙</a>
+    </div>
+    <script src="_framework/blazor.webassembly.js"></script>
+</body>
+
+</html>
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		@using Microsoft.AspNetCore.Components.Routing
		@using standalone