Object and String prototypes are not prototypes of defined strings?

Question

I\'m trying to understand how JavaScript\'s prototype-based inheritance works. I was expecting the below outputs would evaluate as true. Why is this?

Answer 1

This is because the string primitives are not string objects. If you want the above code to work, the string should be constructed via the String class, as in:

var myStr = new String("Sample");
String.prototype.isPrototypeOf(myStr); // true