Hackforge Academy

Explanation

Destructuring is a JavaScript feature that extract values from objects or arrays
Example: 'name' and 'role' are extracted from the user object.

Code:

const user = { id: 1, 
name: 'hackforge',
 role: 'edtech' 
}; 

const { name, role } = user;
//name is hackforge

Explanation

Array destructuring allows you to extract values from arrays based on position. Here, 'first' gets 10 and 'second' gets 20.

Code:

const numbers = [10, 20, 30];
const [first, second] = numbers;

Explanation

In Node.js (Express), destructuring is commonly used to extract values from req.body, req.params, or req.query. makes the code cleaner and avoids repeatedly writing req.body.email, req.body.password, etc.

Code:

app.post('/login', (req, res) => { 
const { email, password } = req.body;
 });

Explanation

Destructuring in Node.js is also used to extract environment variables from process.env. Default values can be assigned if the variable is undefined.

Code:

const { PORT = 3000 } = process.env;