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Supabase Backend as a Service · Lesson

Subscribing to Table Changes

Implement client-side code to listen for inserts, updates, and deletes on specific database tables or rows.

Welcome to Live Data!

In the previous lesson, we learned about the idea of realtime data. Now, let's dive into how your app can actually listen for changes happening in your Supabase database!

This means your users can see updates instantly, without refreshing their screen. Think live chat, notifications, or dashboards.

The Realtime Client

Supabase provides a powerful Realtime client that makes listening for database changes super easy. It's built on PostgreSQL's replication features.

  • It uses WebSockets for instant communication.
  • You'll interact with it through the supabase.realtime object.
  • It works by connecting to specific 'channels'.

All lessons in this course

  1. Understanding Realtime Subscriptions
  2. Subscribing to Table Changes
  3. Building a Live Chat Feature
  4. Presence and Broadcast Channels
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