在浏览器中，Safari的隐私浏览中的sessionStorage与Chrome的隐身模式和Firefox的隐私窗口不一样？

问题描述

看起来对于 sessionStorage ，它在Chrome的隐身模式与Safari的隐私浏览和Firefox的私人窗口上有什么不同？我可以在，但它并没有说Safari的隐私浏览会抛出一个异常。

以下是我如何打开私密浏览：

1. 在Mac上的Safari中，单击菜单栏上的Safari - >私密浏览 $ b
2. 在Chrome上，使用文件 - >新建隐身窗口


3. 在Firefox上，使用文件 - >新建私人窗口 ol>
   
   

   和Safari， sessionStorage 不起作用，如果我在控制台中执行以下操作：

    > sessionStorage [foo] = 123.4 
   错误：QUOTA_EXCEEDED_ERR：DOM异常22 
    
   >在Chrome或Firefox上， sessionStorage 像往常一样工作（作为非隐私浏览）。关于 sessionStorage 的问题，以上是否准确？ 
    
   解决方案
   评估实际上是准确的：
    
    
    
    
    Safari将只使用私有配额 0 模式，所以所有尝试设置值都将失败。根据，这还算不错，因为规范没有强制规定最小的空间要求。
    
    
    Chrome和Firefox仍然允许你使用存储，但是私有存储是独立于非私有的，即设置一个私有模式的项目不会反映回非私有模式（仅限 localStorage ）。
    
    
    
    
    
   请注意，其他浏览器在任何给定的时间也可以自由地抛出 QuotaExceededError 异常，如果你超过配额。
    
   It seems that for sessionStorage, it works differently on Chrome's Incognito Mode vs Safari's Private Browsing and Firefox's Private Window?  I can find something on http://www.webdirections.org/blog/webstorage-persistent-client-side-data-storage/ but it doesn't say that Safari's Private Browsing will throw an exception.
   
   The following is how I opened "Private Browsing":
   
   On Safari on Mac, click "Safari -> Private Browsing" on the menu bar
   On Chrome, use "File -> New Incognito Window"
   On Firefox, use "File -> New Private Window"
   and on Safari, sessionStorage does not work, and if I do the following in the console:
   > sessionStorage["foo"] = 123.4
   Error: QUOTA_EXCEEDED_ERR: DOM Exception 22
   
   > sessionStorage["foo"] 
   undefined
   but on Chrome or Firefox, sessionStorage works as usual (as non-private browsing).  Is the above accurate as far as sessionStorage is concerned?
    解决方案 
   Your assessment is practically accurate:
   Safari will just use a quota of 0 in private mode, so all attempts to set a value will fail. This is kinda OK according to the spec, as the spec does not mandate a minimum space requirement.
   Chrome and Firefox still allow you to use storage, however private storage is independent from non-private, i.e. setting an item in private mode will not reflect back into non-private mode (important for localStorage only).
   Please note that other browsers are also free to throw QuotaExceededError exceptions at any given time, should you go over the quota.
                           
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