pubnub

Build real-time applications with PubNub pub/sub messaging. Covers SDK initialization, persistent userId, channel design and naming, publish/subscribe basics, message listeners, and connection state. Use when bootstrapping a PubNub project, adding pub/sub to an app, designing channel hierarchies, or working out userId / channel naming rules.

Deliver real-time sports scores, play-by-play, and scoreboards with PubNub

Create, configure, and deploy PubNub Functions 2.0 event handlers, triggers, and serverless endpoints. Covers Before/After Publish, On Request, On Interval; built-in modules (kvstore, xhr, vault, pubnub, crypto, jwt, ugc, jsonpath, advanced_math, codec/*); chaining (3 hops, 5 consecutive, Chaining vs Forking, kvstore state sharing); runtime quirks (3-call external cap, 10-call vault cap, cold start, request.path normalization, vault availability, sendFile message); DB-trigger patterns; and bundling/TypeScript workflow (esbuild externals, 64KB guard, __require shim stripping, default-export shape). Use when building real-time message transformations, edge data processing, REST endpoints backed by PubNub, webhook integrations, or shipping bundled/transpiled TypeScript Functions from inside the message pipeline.

Builds real-time analytics and automation with PubNub Illuminate. Covers Business Objects (schema), Metrics (aggregations), Decisions (threshold-triggered actions with the 4-step PUT workflow), Queries (ad-hoc vs saved pipelines), and Dashboards. Use when tracking KPIs, building threshold alerts, automating mute/publish/App-Context-update actions, detecting spam or anomalies, or visualizing live activity.

Scale PubNub applications for high-volume real-time events using channel groups, wildcard subscriptions, sharding, and large-event readiness. Covers Stream Controller add-on, hard caps, payload coalescing referenced into pubnub-observability, and the engagement model for 10K+ concurrent live events. Persistence/history is owned by pubnub-history.

Deliver real-time stock quotes and market data with PubNub

Build real-time order tracking and delivery driver systems with PubNub

Real-time presence with PubNub. Covers Admin Portal Presence add-on configuration, join/leave/timeout events, hereNow occupancy, presence state, dropped-connection categories (PNNetworkDownCategory etc.), heartbeat tuning, and multi-device sync for the same userId. Use when implementing online/offline indicators, occupancy counts, last-seen tracking, or troubleshooting presence flapping.