What are some examples of using route parameters in Express?

Can you give me some examples of using route parameters in Express?

Sure! In Express, route parameters are used to capture values from the URL. For example, you can define a route like this: app.get('/users/:id', (req, res) => { ... }). Here, :id is a route parameter.

How do I access the value of that parameter?

You can access the value of the route parameter using req.params. For example, const userId = req.params.id; will give you the value of :id.

Can I have multiple route parameters?

Yes, you can! For instance, you can define a route like app.get('/users/:userId/posts/:postId', (req, res) => { ... }) to capture both user and post IDs.

What if I want to set default values for parameters?

You can handle default values in your route logic. For example, you can check if a parameter is undefined and assign a default value accordingly.