Pusher Channels JavaScript Client

The `pusher-js` library provides a robust client-side solution for real-time communication via Pusher Channels. It supports a wide array of JavaScript environments, including web browsers, React Native, Node.js, and web workers, offering a consistent API across platforms. Currently at stable version 8.5.0, the library demonstrates an active release cadence, frequently delivering security updates via dependency pinning and introducing new features like the `switchCluster` method for dynamic cluster changes without disrupting existing channel subscriptions. Its key differentiators include extensive platform compatibility, resilient fallback mechanisms (WebSockets, HTTP), and dedicated support for both public and private channels, including an optional build specifically for encrypted channels. It is designed purely for client-side interaction with the Pusher service, distinct from the `pusher-http-node` server-side library.