scheduling.js

const task = cb => {
  const mc = new MessageChannel();
  mc.port1.postMessage(null);
  mc.port2.addEventListener("message", () => {
    cb();
  }, {once: true});
  mc.port2.start();
}
const microtask = cb => queueMicrotask(cb);
// Only available in node
// const nanotask = cb => process.nextTick(cb);
const synchronous = cb => cb();