问题
Let's say I got a global variable called myData. It was declared as myData = 1; at the beginning of a script.
Goal:
I want to create a single module that will not have access this myData in any way. myData must remain global in other modules.
Note: Yes, I already do know that I could require myData in every page where I need it but that's not what I'm looking for.
Attempts:
To do that, at the very beginning of the module, I wrote: var myData;. The module could no longer access myData directly by myData.
Problem: You can still access it via GLOBAL.myData
So I instead, I wrote var myData, GLOBAL; at the beginning of the module.
Are there any other ways someone could access myData? If so, how could I prevent it?
来源：https://stackoverflow.com/questions/23177039/nodejs-variable-scope-preventing-accessing-global-variables