How do I handle optional URL parameters in my web application?

How do I handle optional URL parameters in my web application?

You can handle optional URL parameters by using a routing library that supports them, like Express.js for Node.js.

Can you give me an example of how to implement this in Express?

Sure! You can define a route like this: app.get('/users/:id?', (req, res) => { ... }); The ? makes the id parameter optional.

What if I want to set a default value for the optional parameter?

You can check if the parameter exists and set a default value in your route handler, like this: const userId = req.params.id || 'defaultId';.

Thanks! Is there a way to validate these parameters?

Yes, you can use middleware to validate parameters before reaching your route handler, ensuring they meet your criteria.