The **universal-websocket-client** library provides a drop‑in WebSocket implementation that works both in browsers (using the native `WebSocket` API) and in Node.js (using the `ws` package). By automatically selecting the appropriate client at runtime, it lets developers write isomorphic code that can communicate over WebSockets without bundling the heavier Node‑specific library into browser builds. It’s aimed at JavaScript developers building full‑stack or universal applications who want a single, minimal WebSocket API across environments.