How do I implement middleware in a TypeScript Express app?

How do I implement middleware in a TypeScript Express app?

To implement middleware in a TypeScript Express app, you can create a function that takes the request, response, and next parameters.

Can you show me a simple example of a logging middleware?

Sure! Here's a simple logging middleware:

const logger = (req: Request, res: Response, next: NextFunction) => {
    console.log(`${req.method} ${req.url}`);
    next();
};

You can use it by adding app.use(logger); in your app.

What other types of middleware can I use?

You can use middleware for error handling, authentication, parsing request bodies, and serving static files.

How do I handle errors with middleware?

You can create an error-handling middleware by defining a function with four parameters: err, req, res, next. This will catch errors and send appropriate responses.