[Jx271]

It really is a challenge. I don't think it'll be realistic to build mid-size, fully offline web apps (excluding tools like electron) until indexedDB has wider support. One solution is to garbage collect the oldest data from localStorage and sync with a server when you've got connection, but once you're offline you're kinda stuck with 5mb. However, caniuse.com/#feat=indexeddb is optimistic about the future. The company I work for is trying to make offline/decentralized apps more realistic (gundb.io, github.com/amark/gun) and storage limitations can be aggravating at times.

[daleharvey]

Its realistic now, most people do not want to be using Indexeddb directly and pretty much all IndexedDB wrappers will fallback to webSQL. That gets support back to ie9 which is unsupported by most of the web.