The word on the street is that https://github.com/rhashimoto/wa-sqlite is nearly production ready, closing in on the neat 1.0.0 release, with its IDBBatchAtomic engine highly recommended at https://www.powersync.com/blog/sqlite-persistence-on-the-web. You can try out the benchmark https://rhashimoto.github.io/wa-sqlite/demo/benchmarks.html.And the other contestant is Dexie, stable https://dexie.org/.
If you were to branch into a new venture today, which one would you pick? And why?