[kiwicopple]

yes you're right. The JS library is a thin wrapper around PostgREST's API (https://github.com/supabase/postgrest-js)

Supabase now offers a few more features which integrate with the Postgres database - File Storage (s3), Authentication, Deno Functions, and Realtime (database change listeners). Each of these services is a standalone server and each has a corresponding JS library.

"supabase-js" wraps up the modular JS libraries into a single library for convenience

[LAC-Tech]

Ok that puts in perspective. It's a convenience package not a must have.