A module can contain a whole directory structure full of stuff. Stuff here is a technical term referring to internal file modules, data files, template files, documentation, tests, assets, and more. Once stored within a properly constructed directory structure, Node.js will treat these as a module that satisfies a require('moduleName') call.
This may be a little confusing because the word module is being overloaded with two meanings. In some cases, a module is a file, and in other cases, a module is a directory containing one or more file modules.
In most cases, a directory-as-module contains a package.json file. This file contains data about the module (known as package) that Node.js uses while loading the module. ...
