converting various values to boolean and verify how JavaScript behaves.

js-boolean.js

//if you try following line of code in chrome console
var a = new Boolean(undefined);
console.log(a);
//false

a = new Boolean(null);
console.log(a);
//false;

a = new Boolean(0);
console.log(a);
//false

a = new Boolean('0');
console.log(a);
//false

a = new Boolean(false);
console.log(a);
//false;

a = new Boolean('false');
console.log(a);
//true

a = new Boolean(NaN);
console.log(a);
//false