section6.2.md

Section 6.2: Using a simple module in node.js

A module encapsulates related code into a single unit of code. When creating a module, this can be interpreted as moving all related functions into a file. Now lets see an example. Imagine all files are in same directory:

printer.js

exports.printHelloWorld = function (){
  console.log("Hello World!!!");
}

Another way of using modules:

animals.js

module.exports = {
  lion: function() {
    console.log("ROAARR!!!");
  }
};

Run this file by going to your directory and typing: node app.js app.js

//require('./path/to/module.js') node which module to load
let printer = require('./printer');
let animals = require('./animals');

printer.printHelloWorld(); //prints "Hello World!!!"
animals.lion(); //prints "ROAARR!!!"