Node.js URL Module

⭐ Node.js URL Module

The URL module helps you work with URLs—parsing, formatting, and resolving URL strings.

It is a built-in module, so no installation is required.

✅ Import URL Module

Or using ES Modules:

📌 1. Parse a URL

Using `url.parse()` (Legacy but widely used)

Output:

📌 2. Modern Way: Using `URL` Class (Recommended)

📌 3. URL Properties

Property	Description	Example
`hostname`	Domain name	`example.com`
`pathname`	Path	`/products`
`search`	Query string	`?category=mobile`
`searchParams`	Key/value query params	`.get("category")`
`protocol`	URL protocol	`https:`
`port`	Port number	`3000`
`hash`	Fragment	`#section1`

📌 4. Working With Query Parameters

Get a query parameter

Add a parameter

Delete a parameter

📌 5. Format URL Back to String

📌 6. Example: Parse URL inside Node.js HTTP Server

const http = require("http");
const { URL } = require("url");

http.createServer((req, res) => {
const myUrl = new URL(req.url, "http://localhost");

const name = myUrl.searchParams.get("name");

res.writeHead(200, { "Content-Type": "text/plain" });
res.end(`Hello, ${name || "Guest"}`);
}).listen(3000);

console.log("Server running at http://localhost:3000");

const http = require("http");

const { URL } = require("url");

http.createServer((req, res) => {

const myUrl = new URL(req.url, "http://localhost");

const name = myUrl.searchParams.get("name");

res.writeHead(200, { "Content-Type": "text/plain" });

res.end(`Hello, ${name || "Guest"}`);

}).listen(3000);

console.log("Server running at http://localhost:3000");

Test URL:

Output:

🎯 Where URL Module is Used

✔ Creating APIs
✔ Reading query params
✔ Redirecting users
✔ Validating URLs
✔ Routing in servers
✔ Web scraping

Node.js URL Module

⭐ Node.js URL Module

✅ Import URL Module

📌 1. Parse a URL

Using `url.parse()` (Legacy but widely used)

Output:

📌 2. Modern Way: Using `URL` Class (Recommended)

📌 3. URL Properties

📌 4. Working With Query Parameters

Get a query parameter

Add a parameter

Delete a parameter

📌 5. Format URL Back to String

📌 6. Example: Parse URL inside Node.js HTTP Server

🎯 Where URL Module is Used

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Node.js URL Module

⭐ Node.js URL Module

✅ Import URL Module

📌 1. Parse a URL

Using url.parse() (Legacy but widely used)

Output:

📌 2. Modern Way: Using URL Class (Recommended)

📌 3. URL Properties

📌 4. Working With Query Parameters

Get a query parameter

Add a parameter

Delete a parameter

📌 5. Format URL Back to String

📌 6. Example: Parse URL inside Node.js HTTP Server

🎯 Where URL Module is Used

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Using `url.parse()` (Legacy but widely used)

📌 2. Modern Way: Using `URL` Class (Recommended)