@mikkel-ol/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 {
  sendMessage(object: unknown) {
    const json = JSON.stringify(object);
    this.send(json);
  }
}