atmosphere.js

Modern TypeScript client for the Atmosphere Framework, providing real-time communication via WebSocket, SSE, Long-Polling, Streaming, and WebTransport transports. Version 5.0.29 is the latest stable release. It is actively maintained with frequent updates. Key differentiators include full TypeScript type safety, tree-shakeable imports, optional React/Vue/Svelte integrations as peer dependencies, and automatic reconnection with exponential backoff. Compared to bare WebSocket, it offers transport fallback and protocol abstraction.