How to use Winston in several modules?

Question

I have several modules - let\'s say server.js, module1.js,...,moduleN.js.

I would like define the log file in my server.js:

winston.add(winston.trans         


        

Answer 1

if you want to make the logger a global variable- you have to do specifically by assign it to the global variable like so

logger.js

var winston = require('winston')

var winston = winston.createLogger({
transports: [
  new (winston.transports.Console)(),
  new (winston.transports.File)({
    filename: './logs/logger.log'
  })
]
});
module.exports=winston;

app.js

let logger  = require('./logger')
global.__logger = logger

someController.js

__logger.info('created log successfully')

Note: it's good practice to assign a prefix for every global variable so you will know that is a global one. i'm using __ as prefix (double low dash)