bun-websocket-server

# Bun WebSocket Server Bun has built-in WebSocket support integrated with `Bun.serve()`. ## Quick Start ```typescript const server = Bun.serve({ fetch(req, server) { // Upgrade to WebSocket if (server.upgrade(req)) { return; // Upgraded successfully } return new Response("Not a WebSocket request", { status: 400 }); }, websocket: { open(ws) { console.log("Client connected"); }, message(ws, message) { console.log("Received:", message); ws.send(`Echo: ${message}`); }, close(ws) { console.log("Client disconnected"); }, }, }); console.log(`WebSocket server running on ws://localhost:${server.port}`); ``` ## WebSocket Handlers ```typescript Bun.serve({ fetch(req, server) { server.upgrade(req); }, websocket: { // Client connected open(ws) { console.log("New connection"); }, // Message received message(ws, message) { // message is string | Buffer if (typeof message === "string") { console.log("Text:", message); } else { console.log("Binary:", message); } }, // Connection closed close(ws, code, reason) { console.log(`Closed: ${code} - ${reason}`); }, // Drain event (buffer flushed) drain(ws) { console.log("Buffer drained"); }, // Ping received ping(ws, data) { // Pong sent automatically }, // Pong received pong(ws, data) { console.log("Pong received"); ...