My Winstorn logging set up

logger.js

const winston = require('winston');
require('winston-daily-rotate-file');
const { format } = winston;
const { combine, json, timestamp } = format;
const logDir = process.env.LOGDIR || './logs';

const transports = [];
if (process.env.ENVIRONMENT === 'dev') {
  transports.push(
    new winston.transports.Console({
      format: winston.format.combine(
        winston.format.colorize(),
        winston.format.simple()
      ),
      datePattern: 'YYYY-MM-DD',
    })
  );
} else {
  transports.push(
    new winston.transports.DailyRotateFile({
      filename: `${logDir}/error-%DATE%.log`,
      maxFiles: '30d',
      level: 'error',
    })
  );
  transports.push(
    new winston.transports.DailyRotateFile({
      filename: `${logDir}/combined-%DATE%.log`,
      datePattern: 'YYYY-MM-DD',
      maxFiles: '30d',
    })
  );
}

/**
 * Set a module name.
 *
 * @param {string} moduleName Use the module name here
 * @returns
 */
const getLogger = (moduleName) => {
  if (!winston.loggers.has(moduleName)) {
    winston.loggers.add(moduleName, {
      level: 'info',
      format: combine(timestamp(), json()),
      transports,
      defaultMeta: { module: moduleName },
    });
  }
  return winston.loggers.get(moduleName);
};

module.exports = getLogger;

module-a.js

const getLogger = require('./path/to/logger');
const logger = getLogger('module-A');

logger.info('Started logging!');
try{
  // Refer to some undefined variable. Error!
  const hello = `Hello ${world}!`;
}catch(o_O){
  logger.error('Something went wrong!');
}

some-file.js

const path = require('path');
const getLogger = require('./path/to/logger');

// Use the file name as module name
const logger = getLogger(path.basename(__filename, path.extname(__filename)));

logger.info('Started logging!');
try{
  // Refer to some undefined variable. Error!
  const hello = `Hello ${world}!`;
}catch(o_O){
  logger.error('Something went wrong!');
}