How to persist user data?

[julesvirallinen]

The biggest question for me now is how to save and persist user data.

The easiest would be to add a simple database, but something about the fact that the site enables writing and running any javascript code terrifies me.

Some sort of api where the user can connect their own db and the info is only in localstorage would be cool, but sounds a bit hard.

Or then some no-logon implementation where the user is given a uuid, which is their username, and the only way to fetch and sync their data.

[julesvirallinen]

I also think it would be super important for the user to be able to save and edit their sketches as text files. This is why electron or something would be so cool