I've been working on a project that uses localStorage on an iPad. In my experience, the localStorage is perfectly stable. However, there are two things to consider:
Yes, the storage-limit is still 5Mb. Since characters are stored UTF16, only 2.5M characters can be stored in localStorage.
In contrast to other localStorage implementations, localStorage.setItem() doesn't delete any previous items with the same key before storing the new item. In other words: When overwriting an item, one should always call localStorage.removeItem() before calling localStorage.setItem(), or you'll quickly run out of space.
- 测试结果确实如此。。晕啊。
localStorage（2.5M持久）
（下降的Safari浏览器）sessionStoratge
SQL数据库网站（但必须有权限的用户，最大50M）
日文网站翻译的结果
If you're using HTML5 SQL , the user will be prompted at 5MB intervals to increase the storage limit.