How can I implement rate limiting in my Express.js application?

How can I implement rate limiting in my Express.js application?

You can use middleware like 'express-rate-limit' to easily implement rate limiting in your Express.js app.

Can you show me a basic example of how to set it up?

Sure! First, install the package using npm: npm install express-rate-limit. Then, you can set it up like this:

const rateLimit = require('express-rate-limit');

const limiter = rateLimit({
  windowMs: 15 * 60 * 1000, // 15 minutes
  max: 100 // limit each IP to 100 requests per windowMs
});

app.use(limiter);

What happens if a user exceeds the limit?

If a user exceeds the limit, they will receive a 429 Too Many Requests response, indicating they need to wait before making more requests.