HTTP Server with Typescript

Guide to Setting Up an HTTP Server Using TypeScript. Instructions for configuring and running a simple server, ensuring you can quickly start developing your applications.

Starting point

Prerequisites

• Install NodeJS version 20 or later [ fast ] [ better ]

From scratch

• Run in terminal

  npm init -y
  npm install typescript @types/node tsx -D
  npx tsc --init

• Update tsconfig.json using the microsoft recommendations Node-Target-Mapping.

Next step

• Basic Structure

  mkdir -p src/http
  touch src/http/server.ts

  • Update the "scripts" property for package.json to run tsc in watch mode.

    "dev": "tsx watch src/http/server.ts"

Fastify

• Start here Getting Started.

  npm install fastify

  • Update the server.ts file with the code below.

    import fastify, { FastifyInstance } from "fastify";
    
    const app: FastifyInstance = fastify();
    const port = 3333;
    
    app.get("/", () => {
        return { hello: "world" };
    });
    
    app.listen({ port }).then(() => {
        console.log(`HTTP server running on http://localhost:${port}`);
    });

  • Run your server

    npm run dev

Express

• Start here Getting Started.

  npm install express
  npm install @types/express -D

  • Update the server.ts file with the code below.

    import express, { Request, Response } from "express";
    
    const app = express();
    const port = 3333;
    
    app.use(express.json());
    
    app.get("/", (req: Request, res: Response) => {
        res.json({ message: "Hello, world!" });
    });
    
    app.listen(port, () => {
        console.log(`HTTP server running on http://localhost:${port}`);
    });

  • Run your server

    npm run dev