Supabase JS Has a Free API That Replaces Your Entire Backend

Supabase is the open-source Firebase alternative, and its JavaScript client exposes a complete backend API — database, auth, storage, real-time, and edge functions. The Query Builder: PostgreSQL Power import { createClient } from " @supabase/supabase-js " ; const supabase = createClient ( SUPABASE_URL , SUPABASE_KEY ); // Complex queries with joins const { data } = await supabase . from ( " products " ) . select ( ` id, title, price, categories (name), reviews (rating, comment, user:profiles(name)) ` ) . gte ( " price " , 10 ) . lte ( " price " , 100 ) . order ( " price " , { ascending : true }) . range ( 0 , 49 ); Full PostgreSQL power — joins, aggregations, full-text search — from the client. Real-Time Subscriptions const channel = supabase . channel ( " price-changes " ) . on ( " postgres_changes " , { event : " UPDATE " , schema : " public " , table : " products " , filter : " category=eq.electronics " }, ( payload ) => { console . log ( " Price changed: " , payload . old . price ,