Express.js

Express.js is a widely-used web application framework for Node.js, designed for building web applications and APIs. It simplifies the process of server-side development by providing a robust set of features that streamline routing, middleware integration, and templating.

Example

const express = require("express");
const app = express();
const port = 3000;
 
// basic route for the homepage
app.get("/", (req, res) => {
	res.send("Welcome to the User API!");
});
 
// routing parameters
app.get("/api/users/:id", (req, res) => {
	const userId = parseInt(req.params.id);
	res.send("Using routing parameters !");
});
 
// query strings
app.get("/api/users/search", (req, res) => {
	const { q } = req.query;
	res.send("Using query strings !");
});
 
app.get("*", (req, res) => {
	res.send("Page not found !")
});
 
// start the server
app.listen(port, () => {
	console.log(`Server is running on http://localhost:${port}`)
})