Building Real-Time Features with Supabase

Users expect apps to be alive. Chats, notifications, and collaborative editing should happen instantly.

PostgreSQL as a Realtime Engine

Supabase listens to the PostgreSQL replication stream (WAL) and broadcasts changes via WebSockets.

const channel = supabase
.channel('public:messages')
.on('postgres_changes', { event: 'INSERT', schema: 'public', table: 'messages' }, payload => {
console.log('New message:', payload.new)
})
.subscribe()

This simple code replaces weeks of WebSocket server development.

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