Building a Full-Stack App with Supabase and TypeScript

Why Supabase?

Supabase is an open-source Firebase alternative that provides a powerful Postgres database, authentication, real-time subscriptions, and file storage — all in one platform.

Setting Up Your Project

Start by creating a new Supabase project and installing the required packages.

npm install @supabase/supabase-js @supabase/ssr

Environment Variables

Add your Supabase credentials to .env.local:

NEXT_PUBLIC_SUPABASE_URL=your-project-url
NEXT_PUBLIC_SUPABASE_ANON_KEY=your-anon-key

Type-Safe Database Queries

Supabase generates TypeScript types from your database schema, making it easy to write type-safe queries.

const { data, error } = await supabase
  .from('posts')
  .select('id, title, content')
  .eq('status', 'published')

Row Level Security

RLS policies ensure users can only access their own data. Here's a simple policy for a posts table:

create policy "Users can read published posts"
on posts for select
using (status = 'published');

Conclusion

Supabase combined with TypeScript provides an excellent developer experience for building full-stack applications. The type safety and real-time capabilities make it a solid choice for modern web apps.