How do I configure Winston logger in my Node.js application?

How do I configure Winston logger in my Node.js application?

To configure Winston logger, first install it using npm: npm install winston. Then, you can set it up like this:

const winston = require('winston');

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

logger.info('Logger is configured!');

What are the different transport options available in Winston?

Winston supports various transports such as Console, File, HTTP, and more. You can customize them based on your needs. For example, you can log to the console and a file simultaneously.

Can I log messages in different formats?

Yes, you can log messages in different formats using the format option. Winston provides several built-in formats like json, simple, and combine to customize your logs.

How can I set different log levels?

You can set different log levels by specifying the level property in the logger configuration. Common levels include 'error', 'warn', 'info', 'http', 'verbose', 'debug', and 'silly'.