Morgan is a middleware function for logging information about the http request/response in a server application.

Installation

$ npm install morgan

Use

const morgan = require('morgan');

app.use(morgan('dev'));

Arguments.

Morgan takes two arguments: format and options.
FORMATS
You can defined your own format string or use the predefined formats. I like to keep things simple while learning a new concept hence i opted for the predefined formats. Here are a few predefined formats.

• tiny - logs out minimal information about the request. status.

app.use(morgan('tiny'));

• dev logs out concise output with color coded status.

app.use(morgan('dev'));

• combined logs out Standard Apache combined log output (A lot of information that you probably don't care about).

app.use(morgan('combined'));

For more formats refer to the documentation.

OPTIONS
Valid option (objects) accepted by morgan.

• immediate - information is logged on request instead of on response
• skip - determines if logging is skipped
• stream - Output stream for writing log lines

More on this in the documentation

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