✅ 1. Initialize Project
Write these commands in your powershell.
mkdir my-app
cd my-app
npm init -y
✅ 2. Install Dependencies
Runtime Dependencies
npm install express mongoose
Development Dependencies
npm i --save-dev @types/express
✅ 3. Create tsconfig.json
Generate the config:
npx tsc --init
Edit tsconfig.json:
{
"compilerOptions": {
"rootDir": "./src",
"outDir": "./dist"
}
}
✅ 4. Setup Project Structure
my-app/
├── src/
│ ├── app.ts
│ ├── server.ts
│ └── app/
├── package.json
├── tsconfig.json
└── .gitignore
✅ 5. Add Scripts to package.json
To automatically restart the server whenever you make changes, you can use either ts-node-dev or tsx. This improves your development experience by saving time and effort.
🔧 Option 1: Using ts-node-dev;
Install it as a dev dependency:
npm install --save-dev ts-node-dev
Then, update your package.json scripts:
"scripts": {
"dev": "ts-node-dev --respawn --transpile-only src/server.ts",
"test": "echo \"Error: no test specified\" && exit 1"
}
🔧 Option 2: Using tsx;
Install it (either globally or locally as a dev dependency):
npm install --save-dev tsx
Then, update your package.json:
"scripts": {
"dev": "tsx watch --clear-screen=false src/server.ts",
"test": "echo \"Error: no test specified\" && exit 1"
}
✅ 6. Create .gitignore
node_modules/
dist/
✅ 7. Example Code
src/app.ts
import express, { Application, Request, Response } from 'express';
const app: Application = express();
app.use(express.json())
app.get('/', (req: Request, res: Response) => {
res.send('Welcome from Note App!');
});
export default app;
src/server.ts
import mongoose from 'mongoose';
import { Server } from 'http';
import app from './app';
let server: Server;
const port = 5000;
async function main() {
try {
await mongoose.connect("mongodb+srv://<db_username>:<db_password>@cluster.mongodb.net/todoDB?retryWrites=true&w=majority&appName=Cluster0");
console.log('✅ Connected to MongoDB using Mongoose');
server = app.listen(port, () => {
console.log(`🚀 Server is listening on port ${port}`);
});
} catch (error) {
console.error('❌ Error connecting to MongoDB:', error);
}
}
main();
✅ 8. Run in Development Mode
npm run dev