/Javascript/Node.js/How to manage logging using winston for production and development in node js "github"

How to manage logging using winston for production and development in node js "github"

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

const dotenv = require('dotenv');
dotenv.config();

var logger = createLogger({
    level: 'info',
    format: format.combine(
        format.timestamp({
            format: 'YYYY-MM-DD HH:mm:ss',
        }),
        format.printf((info) =>
            JSON.stringify({
                t: info.timestamp,
                l: info.level,
                m: info.message,
                s: info.splat !== undefined ? `${info.splat}` : '',
            }) + ','
        )
    ),
});

if (process.env.NODE_ENV !== 'PRODUCTION') {
    logger.add(new transports.Console({ format: winston.format.cli() }));

    // Turn these on to create logs as if it were production
    // logger.add(new transports.File({ filename: 'log/output/error.log', level: 'error' }));
    // logger.add(new transports.File({ filename: 'log/output/warn.log', level: 'warn' }));
    // logger.add(new transports.File({ filename: 'log/output/info.log', level: 'info' }));
} else {
    logger.add(new transports.File({ filename: 'log/output/error.log', level: 'error' }));
    logger.add(new transports.File({ filename: 'log/output/warn.log', level: 'warn' }));
    logger.add(new transports.File({ filename: 'log/output/info.log', level: 'info' }));
}

module.exports = {
    logger,
};

Source: stackoverflow.com

Similar codes

110 votes449 views6 answers
Install latest nodejs ubuntu
Javascript Node.js
16 votes354 views2 answers
How to create an array in node js
Javascript Node.js
1 vote327 views1 answer
Node js check if a user exists in mysql
Javascript Node.js
0 vote334 views1 answer
Write head node js
Javascript Node.js
1 vote339 views1 answer
What is the meanof using next in nodejs
Javascript Node.js
4 votes320 views2 answers
How to use online mysql database with node js
Javascript Node.js
0 vote340 views1 answer
Node js code for saving first middle and last name
Javascript Node.js
1 vote327 views1 answer
Jwt token expire time in node js
Javascript Node.js
14 votes330 views2 answers
Nodejs fs delete file
Javascript Node.js
15 votes329 views2 answers
Write json file nodejs
Javascript Node.js