1var o = {
2  a: 2,
3  m: function() {
4    return this.a + 1;
5  }
6};
7
8console.log(o.m()); // 3
9// When calling o.m in this case, 'this' refers to o
10
11var p = Object.create(o);
12// p is an object that inherits from o
13
14p.a = 4; // creates a property 'a' on p
15console.log(p.m()); // 5
16// when p.m is called, 'this' refers to p.
17// So when p inherits the function m of o, 
18// 'this.a' means p.a, the property 'a' of p
19
20
21

1{
2    prop: "some value",
3    __proto__: {
4        foo: "bar",
5        constructor: ƒ doSomething(),
6        __proto__: {
7            constructor: ƒ Object(),
8            hasOwnProperty: ƒ hasOwnProperty(),
9            isPrototypeOf: ƒ isPrototypeOf(),
10            propertyIsEnumerable: ƒ propertyIsEnumerable(),
11            toLocaleString: ƒ toLocaleString(),
12            toString: ƒ toString(),
13            valueOf: ƒ valueOf()
14        }
15    }
16}