Use Log4js in Nodejs can be done for many cool things about log in Nodejs. I will in this video about Log4js in Nodejs helping you to create a global helper file.
Its can be very practical to have a global helper file when you want a generic Log4js setup and you want to have quick access to your Log4js settings.
When you have a global helper file to Log4js in Nodejs you can quick import your Log4js setup, use it and create the logs you need.