class Connection { constructor() { this.ws = null; this.isConnected = false; this.onopen = () => {}; this.onclose = () => {}; this.onmessage = () => {}; } connectTo(url) { if (this.ws) { this.close(); } this.ws = new WebSocket(url, "fs"); this.ws.onopen = () => { this.isConnected = true; this.onopen(); }; this.ws.onclose = () => { this.isConnected = false; this.onclose(); }; this.ws.onmessage = (message) => { this.onmessage(message); }; } send(message) { this.ws.send(message); } close() { this.ws.close(); } }