@thgh/tunnelmole/src/websocket/host-ip-websocket.ts

Tunnelmole, an open source ngrok alternative. Instant public URLs for any http/https based application. Available as a command line application or as an NPM dependency for your code. Stable and maintained. Good test coverage. Works behind firewalls

import WebSocket from 'ws';

export default class HostipWebSocket extends WebSocket
{
    sockets?: Map<string, WebSocket>
    
    sendMessage(object: unknown) {
        const json = JSON.stringify(object);
        this.send(json);
    }
}