Sometimes, we want to use the Node.js Morgan logger.

In this article, we’ll look at how to use the Node.js Morgan logger.

How to use the Node.js Morgan logger?

To use the Node.js Morgan logger, we can use it with log4js.

For instance, we write

const express = require("express");
const log4js = require("log4js");
const morgan = require("morgan");

//...

const theAppLog = log4js.getLogger();
const theHTTPLog = morgan({
  "format": "default",
  "stream": {
    write: (str) => {
      theAppLog.debug(str);
    }
  }
});

//...

const theServer = express();
theServer.use(theHTTPLog);

to create a logger instance with log4js.getLogger.

Then we call morgan with an object sets some options.

We set stream.write to a function that calls theAppLog.debug to use log4js with morgan to do the logging.

And then we call use with theHTTPLog to use the logger created by morgan to do the logging.

Conclusion

To use the Node.js Morgan logger, we can use it with log4js.