sample.js

var ext = require('./sampleExternal');

// In node.js, there is a global object called
// global (go figure)
console.log(global); // empty object

// This is defined in the external JavaScript file
// outside of a function, and with the var keyword
console.log(global.outsideFunctionWithVar); // undefined
console.log(ext.outsideFunctionWithVar); // undefined

// This is defined in the external JavaScript file
// inside of a function, and without the var keyword
console.log(global.insideFunctionWithoutVar); // 'hippo'
console.log(ext.insideFunctionWithoutVar); // undefined

// This is defined in the external JavaScript file
// inside of a function, and with the var keyword
console.log(global.insideFunctionWithVar); // undefined
console.log(ext.insideFunctionWithVar); // undefined


var thisFile = 'on it';

console.log(global.thisFile); // undefined
console.log(thisFile); // 'on it'