How can I implement logging in my TypeScript Express application?

How can I implement logging in my TypeScript Express application?

You can use libraries like Winston or Morgan for logging in your TypeScript Express app. Would you like a code example?

Yes, please provide a code example using Winston.

Sure! First, install Winston with npm install winston. Then, you can set it up like this:

import express from 'express';
import { createLogger, format, transports } from 'winston';

const app = express();

const logger = createLogger({
  level: 'info',
  format: format.combine(
    format.timestamp(),
    format.json()
  ),
  transports: [
    new transports.Console(),
    new transports.File({ filename: 'combined.log' })
  ]
});

app.use((req, res, next) => {
  logger.info(`Request: ${req.method} ${req.url}`);
  next();
});

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

This will log requests to the console and a file.

How can I customize the log format?

You can customize the log format by modifying the format property in the logger setup. For example, you can use format.printf to define your own log message structure.