How to create a Typescript express server in Nodejs

First Run this command in Root directory of your project:

npm init

And then Install the necessary dependencies:

npm install express @types/express typescript ts-node nodemon --save

Create a tsconfig.json file in the root directory of your project and add the following configurations:

{
    "compilerOptions": {
      "target": "es6",
      "module": "commonjs",
      "rootDir": "./",
      "sourceMap": true,
      "outDir": "dist",
      "esModuleInterop": true,
      "strict": true
    }
  }

Create an server.ts file in the root directory of your project and add the following code to create an express server:

import express from "express";

const app = express();

app.get("/", (req, res) => {
  res.send("Hello from Express server!");
});

const port = process.env.PORT || 5000;

app.listen(port, () => {
  console.log(`Express server listening on port ${port}`);
});

1. In the package.json file, add a start script to run the express server using nodemon:

"scripts": {
  "start": "nodemon server.ts"
},

1. To run the server in development mode, use the following command:

npm run start

Your express server is now created and running using typescript in nodejs.