When will you use this?

Use security lessons when LearnHub handles login, payments, or user-generated content.

• CSRF protection and security headers keep LearnHub safe when handling login and payments.
• Rate limiting blocks brute-force attempts on the sign-in API.

Real-world: ShopNest storefront

The E-commerce team building ShopNest storefront uses Bundle Analysis to apply Bundle Analysis when building product pages, cart, and checkout flow. customers and admins never see the TypeScript files — they just get a fast, reliable product pages, cart, and checkout flow.

Production-style code

// next.config.ts — security headers snippet
const securityHeaders = [
  { key: 'X-Frame-Options', value: 'DENY' },
  { key: 'X-Content-Type-Options', value: 'nosniff' }
];

What happens in production: In ShopNest storefront, getting Bundle Analysis right means customers and admins trust the product pages, cart, and checkout flow every day.

Lesson example (start here)

Copy this smaller example first. Once it works, compare it with the real-world code above.

// next.config.ts — security headers snippet
const securityHeaders = [
  { key: 'X-Frame-Options', value: 'DENY' },
  { key: 'X-Content-Type-Options', value: 'nosniff' }
];

Line-by-line walkthrough

How it works (big picture)

• Study the example line by line.
• Each part connects to Bundle Analysis.
• Edit one line, save, run npm run dev, and see what changes.

Do this on your computer

1. Apply one security control from the example.
2. Scan headers with browser devtools or securityheaders.com.
3. Note one threat this lesson mitigates.
4. Read the real-world section and name which part of LearnHub uses this topic.
5. Run the example locally with npm run dev and confirm the same behavior.
6. Change one value in the example (route, text, or course id) and predict what will happen before you save.

Experiments — try changing this

• Change a string or route in the example and save — watch the browser update.
• Break the code on purpose (remove a bracket), read the error overlay, then fix it.

Remember

You learned what Bundle Analysis is and when to use it in LearnHub. Practice by changing the example yourself. Use the Next link when you can explain it in your own words.

Common questions