broadcast

broadcast.ts

import { delay } from "https://deno.land/std@0.101.0/async/delay.ts";

const send = new BroadcastChannel("a");
const recv = new BroadcastChannel("a");

addEventListener("fetch", (event) => {
  event.respondWith(handler(event.request));
})

function handler(_req) {
  send.postMessage(new Uint8Array(8));
  return new Response("success");
}

recv.onmessage = async (_) => {
  await delay(1000);
  send.postMessage(new Uint8Array(8));
}