JavaScript heavy Difficulty (prototype chain this) understanding there is always a process, do not hurry, step-by!

Start adding:

1. Use the function definition as the object's property, called the object method.
2. The point of this is determined by the context in which the function is called (context), not by the context in which the function is defined.
3. Because when a function is called as a function instead of a method, this points to a global object. Window object

One: Prototype chain:

1._proto_ this property

Two: this:

1.this refers to the object that called the function!

2.this refers to the global object.

Third: The global object in JavaScript

1. Window belongs to the DOM interface, which is not part of the core javascript!?

Article reference:

1. http://kb.cnblogs.com/page/55718/

JavaScript heavy Difficulty (prototype chain this) understanding there is always a process, do not hurry, step-by!