sqlite-vfs VS absurd-sql

You may be able to have something working by implementing a VFS. (https://github.com/rkusa/sqlite-vfs)

With that, I had enough information to build sqlite-vfs, a Rust library that wraps all the necessary interactions with the C SQLite library and exposes a much simpler Rust trait. I'll not go into the details of this library here.

Not really, but I'm aware of absurd-sql. Note that this requires IndexedDB and thus a browser environment.

I don't need SQL capabilities, so I didn't look into those options (there's also absurd-sql, which ports sqlite to the browser on top of IndexedDB).

Ironically I was just about to drop in absurd-sql [1] to a project, which uses indexeddb to back SQLite. This seems better.

[1] https://github.com/jlongster/absurd-sql

There is also absurd-sql that is sqlite3 in wasm using IndexDB as storage and it’s faster than IndexDB itself

[1]: https://github.com/jlongster/absurd-sql

Offline data: running it in the browser for an offline cache, similar to sql.js or absurd-sql.

We are very close to having WASM SQLite with persistence in the web platform. Until now SQLite compiled to WASM was in memory and you had to write the whole database out as a binary array to save changes. There is absurd-sql (https://github.com/jlongster/absurd-sql), which builds a virtual file system on top of IndexedDB for sqlite, its incredible, but a bit of an ugly hack.

However, the new file-access apis (https://developer.mozilla.org/en-US/docs/Web/API/File_System...) that are landing in browsers will fix this. One of the things it does is enable very efficient block level read/write access to a privet sandboxed filesystem for the websites origin, perfect for persistent sqlite. There is more here: https://web.dev/file-system-access/#accessing-files-optimize...