JavaScript: Installing

You can install @supabase/supabase-js via the terminal.

You can install @supabase/supabase-js via CDN links.

<script src="https://cdn.jsdelivr.net/npm/@supabase/supabase-js@2"></script>
//or
<script src="https://unpkg.com/@supabase/supabase-js@2"></script>

You can use supabase-js in the Deno runtime via JSR:

  import { createClient } from 'npm:@supabase/supabase-js@2'

supabase-js uses the Data API to query and mutate your Postgres data. You first need to grant Data API roles permissions to access your tables and functions.

In Data API integrations settings, expose the specific tables and functions you want to access. To automatically grant access for new tables and functions in public, enable Default privileges for new entities.

Alternatively, use SQL to grant the required permissions:

-- Before granting access to client roles, make sure RLS is enabled
-- and create the policies required for each role's allowed operations.
alter table public.your_table enable row level security;
-- create policy ... on public.your_table ...;

-- Grant least-privilege access to tables after RLS and policies are in place
grant select on public.your_table to anon;
grant select, insert, update, delete on public.your_table to authenticated;
grant all on public.your_table to service_role;

-- Grant execute on functions after verifying any table access they rely on
grant execute on function public.your_function to authenticated, service_role;