Express 5 cheatsheet

Express 5: Setup

4 common Express 5 tasks.

Install Express

Add Express to a Node.js project.

npm install express

Hello world server

The smallest Express app. It listens on port 3000.

import express from "express";

const app = express();

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

app.listen(3000, () => console.log("Listening on http://localhost:3000"));

Run with auto-restart

Restart the server when files change, using Node's built-in watcher.

node --watch server.js

Load environment variables

Read PORT and other settings from a .env file.

node --env-file=.env server.js