Fastify

Install Required Packages

To set up your Fastify server with Remult, run the following commands to install the necessary packages:

npm install fastify remult
npm install --save-dev tsx

Bootstrap Remult in the Backend

Remult is integrated into your backend as Fastify middleware.

1. Create the API File

   Create a new api.ts file in the src/server/ folder with the following code to set up the Remult middleware for Fastify:

   // src/server/api.ts
   
   import { remultFastify } from 'remult/remult-fastify'
   
   export const api = remultFastify()

2. Register the Middleware

   Update the index.ts file in your src/server/ folder to include the Remult middleware. Add the following lines:

   // src/server/index.ts
   
   import fastify from "fastify"
   import { api } from "./api.js"
   
   const app = Fastify();
   
   app.register(api);
   
   app.listen({ port: 3002 }, () => console.log("Server started"))

   ESM Configuration

   Similar to the Express setup, when using ECMAScript modules (esm) in Fastify, you must include the .js suffix when importing files (as shown in the import { api } from "./api.js" statement).

   Also, ensure that "type": "module" is set in your package.json.

Create the Server's TypeScript Configuration

In the root folder, create a TypeScript configuration file named tsconfig.server.json for the server project:

{
  "compilerOptions": {
    "experimentalDecorators": true,
    "skipLibCheck": true,
    "esModuleInterop": true,
    "outDir": "dist",
    "rootDir": "src",
    "module": "nodenext"
  },
  "include": ["src/server/**/*", "src/shared/**/*"]
}

This configuration enables TypeScript decorators, ensures compatibility with ECMAScript modules, and specifies the file paths for the server and shared code.

Create an npm Script to Start the API Server

To simplify the development process, add a new script in your package.json to start the Fastify server in development mode:

// package.json

"dev-node": "tsx watch --env-file=.env --tsconfig tsconfig.server.json src/server"

• tsx: A TypeScript Node.js execution environment that watches for file changes and automatically restarts the server on each save.
• --env-file=.env: Ensures environment variables are loaded from the .env file.
• --tsconfig tsconfig.server.json: Specifies the TypeScript configuration file for the server.

Start the Fastify Server

Open a new terminal and run the following command to start the development server:

npm run dev-node

The server will now run on port 3002. tsx will watch for any file changes, automatically restarting the Fastify server whenever updates are made.