This is a lib for integrating a Vite app in an aspnet or aspnet core app. Aspnet app provides the backend while a Vite SPA app provides the frontend.

For aspnet core

Add the NuGet package Soukoku.AspNetCore.ViteIntegration, then in the typical Program.cs file, register it with

var builder = WebApplication.CreateBuilder(args);

// depends on the actual dev server url
builder.Services.AddViteManifest("https://localhost:3000");

In a controller method that should serve the SPA view, use "VuePage" and give it a VitePageMvcModel.

[HttpGet("{*anyPath}")]
public ActionResult Index(string? anyPath = null)
{
    var model = new VitePageMvcModel
    {
        Entry = "src/main.ts",
        UseAntiforgery = true, // if necessary
        PageData = new         // as needed
        {
            Property = "howdy"
        }
    };
    return View("VuePage", model);
}

Run the typical npm run dev in your vite app folder, then debug in aspnet as usual.

For aspnet mvc (fx 4.7.2+)

Add the NuGet package Soukoku.AspNet.Mvc.ViteIntegration, then in the typical RouteConfig.cs file, register it with.

// assuming "dist" output content is placed in a folder in site root
var manifestPath = HostingEnvironment.MapPath("~/vite-app/.vite/manifest.json");

#if DEBUG
    // for dev-time, we need to specify dev server URL
    routes.MapViteSpaProxy(manifestPath, "https://localhost:3000");
#else
    routes.MapViteSpaProxy(manifestPath, null);
#endif

In a controller method that should serve the SPA view, use "VuePage" and give it a VitePageMvcModel.

public ActionResult Index()
{
    var model = new VitePageMvcModel
    {
        Entry = "src/main.ts",
        UseAntiforgery = true, // if necessary
        PageData = new         // as needed
        {
            Property = "howdy"
        }
    };
    return View("VuePage", model);
}

For dev time, ensure these are in the web.config file

  <!--used by spa dev proxy to allow : in url-->
  <location path="@id">
    <system.web>
      <httpRuntime requestPathInvalidCharacters="&lt;,&gt;,*,%,&amp;,\,?" />
    </system.web>
  </location>
  
  <!--allow path with file extensions to be handled by spa dev proxy-->
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true" />
    <handlers>
      <remove name="ExtensionlessUrlHandler-Integrated-4.0" />
      <remove name="OPTIONSVerbHandler" />
      <remove name="TRACEVerbHandler" />
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler" preCondition="integratedMode,runtimeVersionv4.0" />
    </handlers>
  </system.webServer>

Run the typical npm run dev in your vite app folder, then debug in aspnet as usual.

Examples

A more complete example is in the repo.