nodejs global variable across files code example

Example 1: node.js save global variable

global.number = 5;

Example 2: javascript global variable across files

var window.iAmGlobal = "some val"; //Global variable declaration with window.
 
//Any place in other part of code
 
function doSomething()
{
    alert(window.iAmGlobal); //I am accessible here too !!
    //OR
    alert(iAmGlobal); //I am accessible here too !!
}

Example 3: set a variable in express.js

app.set('oneSetting', 'one');
app.set('twoSetting', 'two');
app.set('view engine','jade');

console.log(app.settings.oneSetting);
console.log(app.settings.twoSetting);
console.log(app.settings['view engine']);