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Make your app feel alive with live updates, instant messages, and collaborative experiences — no page refresh needed.
Real-time means your app updates instantly without the user needing to refresh the page. When someone sends a message, everyone in the chat sees it appear immediately. When data changes on the server, dashboards update on their own.
Think of it like a group text vs. email — real-time is the group text where messages pop up the moment they are sent.
Instant messages between users, group chats, DMs
Alerts that pop up instantly when something happens
Charts and stats that update as new data arrives
Multiple people editing the same document at once
See where other users are clicking and typing in real time
Comments and emoji reactions that appear instantly for everyone
A persistent two-way connection between browser and server. Both sides can send messages anytime. Best for chat and collaboration.
Like a phone call — both people can talk anytime.
A one-way stream from server to browser. The server pushes updates, but the browser only listens. Great for notifications and feeds.
Like a radio broadcast — you listen but don't talk back.
The browser asks the server for updates on a timer (e.g., every 5 seconds). Simple but less efficient. Fine for low-frequency updates.
Like checking your mailbox every few minutes.
Built into Supabase — listen to database changes in real time. Great if you already use Supabase.
Hosted real-time messaging service. Easy to set up, generous free plan. Good for notifications and simple chat.
Reliable real-time infrastructure. Handles presence, history, and scaling automatically.
The classic open-source WebSocket library. Needs your own server but gives full control.
Purpose-built for collaborative features like live cursors, presence, and real-time editing.
Copy-paste these prompts into your AI tool to apply what you just learned.
ADD REAL-TIME UPDATES
"Add real-time updates to my [chat/dashboard/feed] using Supabase Realtime. When a new [message/record] is added to the database, show it instantly without refreshing."
BUILD LIVE NOTIFICATIONS
"Build a live notification system for my app. When [event happens], show a toast notification to the user in real time."
When asking AI to add real-time features, be specific about the technology and what should update live.
Add real-time chat using Supabase Realtime with message history and a scrollable message list
Show live notifications using Server-Sent Events that appear as a badge on the bell icon
Add live cursors so users can see each other's mouse positions using Liveblocks
Create a real-time dashboard that updates the sales chart every time a new order comes in
Add typing indicators to the chat so users can see when someone is writing a message
