presence-room-42
Realtime chat
Rooms, membership and typing indicators on presence channels.
Use case
Notifications
A per-user private channel turns delivery into one publish. Whatever the user has open receives it, and your code never tracks which.
private-user-1e9
- private channels
- events
- webhooks
How it works
- 01Subscribe per userYour auth endpoint confirms the socket belongs to that user and nobody else.
- 02Publish onceOne trigger on that channel. Reaching every open session is our job.
- 03Know if nobody is listeningOccupancy webhooks tell you when to fall back to email instead.
Worth knowing
Delivery reaches sessions open right now. Anything that must survive a closed tab needs storing — the channel is delivery, not the record.
In code
notify.js
js
// One trigger reaches every device this user has connected.await pusher.trigger(`private-user-${user.id}`, 'notification', { id: notification.id, kind: 'mention', title: 'You were mentioned in #incidents', url: `/threads/${thread.id}`,})Written with the official Pusher libraries, unmodified — there is no PushCaster package to install. Full documentation
Other things people build
All use casesprivate-metrics
Live dashboards
Push metrics as they change instead of polling for them.
presence-doc-9f2
Collaborative interfaces
Shared documents, canvases and cursors with tracked membership.