Here are the useful resources on indexeddb as of now:

A useful video tutorial with code

A video w/ some rationale

A guy in germany is writing a wrapper

However, indexeddb doesn’t provide a way to do fulltext search, which means that it’s not useful in many situations. It looks like google is pushing for it to do fulltext search, but that won’t happen for a while it seems. When it does, it will seemingly be pretty useful.

In the meantime, there is websql which implements sqlite.