__proto__ VS. prototype in JavaScript

Question

This figure again shows that every object has a prototype. Constructor function Foo also has its own __proto__ which is Function.prototype, a

Answer 1

Prototype or Object.prototype is a property of an object literal. It represents the Object prototype object which you can override to add more properties or methods further along the prototype chain.

__proto__ is an accessor property (get and set function) that exposes the internal prototype of an object thru which it is accessed.

References:

1. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/prototype

2. http://www.w3schools.com/js/js_object_prototypes.asp

3. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/proto