Introduction to examples of conflicting meanings of names in JavaScript_javascript skills

In yesterday's "Javascript Definitive Guide" Study Notes No. 10: ECMAScript 5 Enhanced Object Model article, a strange phenomenon occurred when debugging a piece of code. The source code is now posted below:

Copy code The code is as follows:

The result of running in Google:
http://img.blog.csdn.net/20140529073008296?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvdTAxMTA0Mzg0Mw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity /Center
This result is correct, but if you change one place, the result will be different

Copy the code The code is as follows:

Run result:

Why is this? I just changed a simple variable name

The problem lies in the name, but I am not familiar with JS and I don’t understand it. I searched for information on the Internet and found no results. Later I asked a senior brother for advice and he also changed the name. The question was posted on the forum: http://bbs.csdn.net/topics/390799744?page=1#post-397474060,

name is the window attribute, which is used to set or return the name and data of the window. Type is string. Because the first sentence is function Person(){}, it has ended, so the following code may be in the global context. That is to say, you think alert(JSON.stringify(name)); is the output var name above, but What may actually be output is window.name. As for the output [Object object], this type is the type of the value of name.