/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

38 votes250 views6 answers
Nodejs cors
Javascript Node.js
1 vote208 views1 answer
Onclick node js
Javascript Node.js
21 votes248 views5 answers
Read a file nodejs
Javascript Node.js
0 vote243 views1 answer
Node js run bat file
Javascript Node.js
4 votes333 views2 answers
Node log without newline
Javascript Node.js
0 vote255 views2 answers
Call node js function from javascript
Javascript Node.js
0 vote238 views3 answers
How to get a particular line from a file in nodejs
Javascript Node.js
2 votes308 views1 answer
Is node js faster than python
Javascript Node.js
-2 votes240 views1 answer
Formidable form node js
Javascript Node.js
1 vote261 views1 answer
How to filter array objesct in express node js
Javascript Node.js