覆蓋原生方法和對象INSIDE特定對象

Question

我試圖覆蓋一個名爲「localStorage」的本地方法，用於INSIDE對象中的函數。

這裏是我想要做一個要點：

function SomeObject(){ 
    this.localStorage = "aaa"; //block access to localStorage for functions INSIDE this object. 
     ... (some more code here) 
    _testRun(){ 
     window.testA = localStorage; //chose to store the instance on a window (global-like) object 
    } 
    this.testRun = function(){ _testRun(); }; 
    this.testRun2 = function(){ window.testB = localStorage;};v 
} 
var a = new SomeObject(); 
a.testRun(); 
a.testRun2(); 

(after this, when I look up window.testA and window.testB, they both point to the Native localStorage, not the custom one inside the SomeObject.) 

BTW，我不想覆蓋原有的功能，整個文檔。 （即可能使用本地localStorage的對象外）

關於如何做到這一點的任何建議/解決方案？謝謝！

Answer 1

嘗試添加window.localStorage和this.localStorage，而不是僅僅localStorage

function SomeObject(){ 
    this.localStorage = "aaa"; //block access to localStorage for functions INSIDE this object. 
     ... (some more code here) 
    _testRun(){ 
     window.testA = window.localStorage; //chose to store the instance on a window (global-like) object 
    } 
    this.testRun = function(){ _testRun(); }; 
    this.testRun2 = function(){ window.testB = this.localStorage;}; 
}