Is localStorage reliable on an iPad?

Question

I'm seeing a few comments from people suggesting that localStorage on an iPad is unreliable. Can anyone confirm that they are happily using localStorage on an iPad? I understand that there is a 5Mb limit too - is that still the case?

Thanks

Answer 1

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.