node-scope-test.js

var sys = require('sys');

sys.puts("Top level");

sys.puts(" this === GLOBAL: " + (this === GLOBAL));   // false
sys.puts(" this === exports: " + (this === exports)); // true

var x = "1"; // local variable

sys.puts(" x === GLOBAL.x: " + (x === GLOBAL.x));   // false
sys.puts(" x === exports.x: " + (x === exports.x)); // false

this.y = "2"; // property of this

sys.puts(" this.y === GLOBAL.y: " + (this.y === GLOBAL.y));   // false
sys.puts(" this.y === exports.y: " + (this.y === exports.y)); // true

(function(){ // anonymous function

    sys.puts("Inside function");

    sys.puts(" this === GLOBAL: " + (this === GLOBAL));   // true
    sys.puts(" this === exports: " + (this === exports)); // false

    this.z = "3"; // property of this

    sys.puts(" this.z === GLOBAL.z: " + (this.z === GLOBAL.z));   // true
    sys.puts(" this.z === exports.z: " + (this.z === exports.z)); // false

})();