Investigate Blob support

[cyrilletuzi]

Currently, the lib doesn't officialy support Blob.

If you try to store Blob, the lib will be OK but:

• it will be fine in Chrome/Firefox/Safari desktop indexedDb
• won't fail but won't be usable in Safari Mobile indexedDb which doesn't support this feature (could be done via base64 encoding)
• need to check in IE/Edge indexedDb
• it won't fail but won't be usable in localStorage, where an asynchronous conversion would be needed (via FileReader)
• Blob are not supported at all in IE9

Please comment if this feature would be useful to. you. Not planned currently as it would be a huge work and not even sure it's possible to make it work everywhere.

[blochealth]

I would like this feature, but at a minimum can it throw an error now in localStorage if the type is Blob? Got confused when it didn't work as expected when simpler keyed items did.

[cyrilletuzi]

Decisions taken:

• v8 of the lib will now throw when trying to store data that can't be serialized in localStorage
• Safari issues (if still present) are browsers bug, it's not to this lib to take action
• IE9 is not a concern for the lib, as code with Blob would completely fail in IE9, so it's to the user to check Blob support and still wants IE9 support