CommonJS.js

//my-module.js
var privateVar = "Ben Cherry";
var publicVar = "Hey there!";

function privateFunction() {
    console.log( "Name:" + privateVar );
}

function publicSetName( strName ) {
    privateVar = strName;
}

function publicGetName() {
    privateFunction();
}

module.exposts = {
    setName: publicSetName,
    greeting: publicVar,
    getName: publicGetName
}

// index.js
const myModule = require('my-module');

myModule.setName( "Paul Kinlan" );