createSuspendEvent.js

// https://codesandbox.io/s/createsuspendevent-7yuzl?file=/src/Test.js
const createSuspendEvent = (fn) => {
  return () => {
    createResource(() => {
      return new Promise((resolve) => {
        fn((cleanup) => {
          if (typeof cleanup === 'function') {
            cleanup();
          }
          resolve();
        });
      });
    })(fn);
  };
};