How do I handle route parameters in Express?

How do I handle route parameters in Express?

In Express, you can handle route parameters by defining them in your route path using a colon. For example, "/users/:id" allows you to access the user ID.

Can you show me an example of how to use it in code?

Sure! Here's a simple example:

const express = require('express');
const app = express();

app.get('/users/:id', (req, res) => {
    const userId = req.params.id;
    res.send(`User ID is: ${userId}`);
});

app.listen(3000, () => {
    console.log('Server is running on port 3000');
});

This will respond with the user ID when you access a URL like "/users/123".

What if I want to handle multiple parameters?

You can define multiple parameters in the route path. For example, "/users/:id/posts/:postId" allows you to access both the user ID and post ID using req.params.id and req.params.postId.