// primitive string
var greet = new String("Hello there");
// primitive is converted to an object
// in order to use the split() method
greet.split(' ')[0]; // "Hello"
// attemting to augment a primitive is not an error
greet.smile = true;
// but it doesn't actually work
console.log(typeof greet.smile); // "boolean"

// string with wrapper
var greet = new String("Hello there");
// object has split() method
greet.split(' ')[0]; // "Hello"
// augmenting object
greet.smile = true;
console.log(typeof greet.smile); // "boolean"