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Inertia.js ASP.NET Adapter

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Features

Table of contents

Examples

You can check out these examples to have some starting point for your new application.

Installation

  1. Using Package Manager: PM> Install-Package AspNetCore.InertiaCore
  2. Using .NET CLI: dotnet add package AspNetCore.InertiaCore

Getting started

You need to add few lines to the Program.cs or Starup.cs file.

using InertiaCore.Extensions;

[...]

builder.Services.AddInertia();

[...]

app.UseInertia();

Usage

Frontend

Create a file /Views/App.cshtml.

@using InertiaCore
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8"/>
    <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
    <title inertia>My App</title>
</head>
<body>
@await Inertia.Html(Model)

<script src="/js/app.js"></script>
</body>
</html>

You can change the root view file using:

builder.Services.AddInertia(options =>
{
    options.RootView = "~/Views/Main.cshtml";
});

Backend

To pass data to a page component, use Inertia.Render().

    public async Task<IActionResult> Index()
    {
        var posts = await _context.Posts.ToListAsync();
        
        var data = new
        {
            Posts = posts,
        };
        
        return Inertia.Render("Posts", data);
    }

To make a form endpoint, remember to add [FromBody] to your model parameter, because the request data is passed using JSON.

    [HttpPost]
    public async Task<IActionResult> Create([FromBody] Post post)
    {
        if (!ModelState.IsValid)
        {
            // The validation errors are passed automatically.
            return await Index();
        }
        
        _context.Add(post);
        await _context.SaveChangesAsync();
        
        return RedirectToAction("Index");
    }

Features

Shared data

You can add some shared data to your views using for example middlewares:

using InertiaCore;

[...]

app.Use(async (context, next) =>
{
    var userId = context.Session.GetInt32("userId");
    
    Inertia.Share("auth", new
    {
        UserId = userId
    });
    
    // Or
    
    Inertia.Share(new Dictionary<string, object?>
    {
        ["auth"] => new
        {
            UserId = userId
        }
    });
});

Async Lazy Props

You can use async lazy props to load data asynchronously in your components. This is useful for loading data that is not needed for the initial render of the page.


// simply use the LazyProps the same way you normally would, except pass in an async function

    public async Task<IActionResult> Index()
    {
        var posts = new LazyProp(async () => await _context.Posts.ToListAsync());
        
        var data = new
        {
            Posts = posts,
        };
        
        return Inertia.Render("Posts", data);
    }

Server-side rendering

If you want to enable SSR in your Inertia app, remember to add Inertia.Head() to your layout:

@using InertiaCore
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8"/>
    <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
    <title inertia>My App</title>
    
    @await Inertia.Head(Model)
</head>
<body>
@await Inertia.Html(Model)

<script src="/js/app.js"></script>
</body>
</html>

and enable the SSR option:

builder.Services.AddInertia(options =>
{
    options.SsrEnabled = true;
    
    // You can optionally set a different URL than the default.
    options.SsrUrl = "http://127.0.0.1:13714/render"; // default
});

Vite Helper

A Vite helper class is available to automatically load your generated styles or scripts by simply using the @Vite.Input("src/main.tsx") helper. You can also enable HMR when using React by using the @Vite.ReactRefresh() helper. This pairs well with the laravel-vite-plugin npm package.

To get started with the Vite Helper, you will need to add one more line to the Program.cs or Starup.cs file.

using InertiaCore.Extensions;

[...]

builder.Services.AddViteHelper();

// Or with options (default values shown)

builder.Services.AddViteHelper(options =>
{
    options.PublicDirectory = "wwwroot";
    options.BuildDirectory = "build";
    options.HotFile = "hot";
    options.ManifestFilename = "manifest.json";
});

Examples

Here's an example for a TypeScript React app with HMR:

@using InertiaCore
@using InertiaCore.Utils
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title inertia>My App</title>
  </head>
  <body>
    @* This has to go first, otherwise preamble error *@
    @Vite.ReactRefresh()
    @await Inertia.Html(Model)
    @Vite.Input("src/main.tsx")
  </body>
</html>

And here is the corresponding vite.config.js

import { defineConfig } from "vite";
import react from "@vitejs/plugin-react";
import laravel from "laravel-vite-plugin";
import path from "path";
import { mkdirSync } from "fs";

// Auto-initialize the default output directory
const outDir = "../wwwroot/build";

mkdirSync(outDir, { recursive: true });

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [
    laravel({
      input: ["src/main.tsx"],
      publicDirectory: outDir,
    }),
    react(),
  ],
  resolve: {
    alias: {
      "@": path.resolve(__dirname, "src"),
    },
  },
  build: {
    outDir,
    emptyOutDir: true,
  },
});

Here's an example for a TypeScript Vue app with Hot Reload:

@using InertiaCore
@using InertiaCore.Utils
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title inertia>My App</title>
  </head>
  <body>
    @await Inertia.Html(Model)
    @Vite.Input("src/app.ts")
  </body>
</html>

And here is the corresponding vite.config.js

import {defineConfig} from 'vite';
import vue from '@vitejs/plugin-vue';
import laravel from "laravel-vite-plugin";
import path from "path";
import {mkdirSync} from "fs";

const outDir = "../wwwroot/build";

mkdirSync(outDir, {recursive: true});

export default defineConfig({
  plugins: [
    laravel({
      input: ["src/app.ts"],
      publicDirectory: outDir,
      refresh: true,
    }),
    vue({
      template: {
        transformAssetUrls: {
          base: null,
          includeAbsolute: false,
        },
      },
    }),
  ],
  resolve: {
    alias: {
      "@": path.resolve(__dirname, "src"),
    },
  },
  build: {
    outDir,
    emptyOutDir: true,
  },
});

Here's an example that just produces a single CSS file:

@using InertiaCore
@using InertiaCore.Utils
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  </head>
  <body>
    @await Inertia.Html(Model)
    @Vite.Input("src/main.scss")
  </body>
</html>