Winston Multi File Logger

winston-multi-file is used to create multiple files based on label, base of this package is winston, you can integrate other winston transporter also.

Install

npm i winston-multi-file

Use

import winston from "winston"; //this is required for transporter
import Logger from "winston-multi-file";

// for commonjs module
//const winston = require("winston");//this is required for transporter
//const Logger = require("winston-multi-file");

const logger = new Logger();

//set log directory default will be logs
logger.setLogDir('logs'); 

//set custom format default is `${timestamp} : ${level} : ${message}`
logger.setFormat(({ level, message, label, timestamp }) => {
	return  `${timestamp} : ${label} : ${level} : ${message}`;
});

//add console transporter, it will console each log
logger.transporter([new winston.transports.Console({})])
//add file transporter, it will combined all logs in merge.log file
logger.transporter([new winston.transports.File({filename:'merge.log'})])

const userModuleLog = logger.getLogger('user_module');
const paymentModuleLog = logger.getLogger('payment_module');

//creates user_module_YYYY_MM_DD.log file and add this log
userModuleLog.info('User has been created successfully.'); 
//creates payment_module_YYYY_MM_DD.log file and add this log
paymentModuleLog.error('payment of user failed.');