1. Prototypal Inheritance

2. Can We Do Inheritance Without Classes? How do we share behaviour across objects

3. Name/Value Pairs Everything in JavaScript uses

4. Objects With Constructors function Foo(name) { this.name = name; } Foo.prototype = { alertName: function () { alert(this.name); } }; foo = new Foo("Jack”); foo.alertName();

5. .prototype vs.[[prototype]] [[prototype]] is a part of the ECMA standard and is not a property you directly access..prototype is only used with constructors. You can’t use it to switch prototypes on the fly.

6. What sets the prototype? new operator Object.create().prototype property of a constructor function Literals Regexp literal, function expression, array literal These objects all have their respective prototype object in their proto type chain.

7. Setting a Prototype with Object.create() var a = {a: 1}, b = Object.create(a); console.log(a.a) //outputs 1 console.log(b.a) // outputs 1 // because a is a prototype of b. console.log(a.isPrototypeOf(b)); //returns true

8. When referencing a property of an object, JavaScript first checks the the object then its prototype(s) until finally undefined is returned. Note the similarity of the Prototype Chain to the Scope Chain.