How can I create custom logging levels in Winston?

How can I create custom logging levels in Winston?

To create custom logging levels in Winston, you can define your own levels using the add method. Would you like an example?

Yes, please provide an example of how to do that.

Sure! You can define custom levels like this:

const { createLogger, format, transports } = require('winston');

const customLevels = {
  levels: {
    error: 0,
    warn: 1,
    info: 2,
    debug: 3,
    custom: 4
  },
  colors: {
    error: 'red',
    warn: 'yellow',
    info: 'green',
    debug: 'blue',
    custom: 'magenta'
  }
};

const logger = createLogger({
  levels: customLevels.levels,
  format: format.combine(
    format.colorize(),
    format.simple()
  ),
  transports: [
    new transports.Console()
  ]
});

logger.custom('This is a custom log message!');

This will log a message with your custom level.

What if I want to change the default log levels?

You can change the default log levels by modifying the levels object in the custom levels definition. Just assign new values to the levels you want to change.