JSFiddle - React, Tailwind, and code Playground

HTML

<script>

let socket = new WebSocket("wss://rest-unstable.mainnet.cash/api/v1/wallet");
socket.onopen = (event) => {
  let request = {method: "watchBalance", data: {cashaddr: "bitcoincash:qzxzl07tth5qx4shphrpzz38wnstwac5ksqnc6yyr3"}};
  socket.send(JSON.stringify(request));
};

socket.onmessage = (event) => {
  const transaction = JSON.parse(event.data);
  console.log(transaction);
};

</script>