How can I create custom Morgan tokens for logging?

How can I create custom Morgan tokens for logging?

You can create custom Morgan tokens by using the morgan.token method. What specific information do you want to log?

I want to log the request method and the response time.

You can define your tokens like this:

morgan.token('method', function (req) {
  return req.method;
});

morgan.token('response-time', function (req, res) {
  return `${res.get('X-Response-Time')} ms`;
});

Then, you can use them in your logging format.

How do I include these tokens in the logging format?

You can include them in your Morgan setup like this:

app.use(morgan(':method :url :response-time')); 

This will log the method, URL, and response time.