InvertedPromise.js

InvertedPromise.js

function InvertedPromise() {
  let _ = undefined;
  return Object.assign(new Promise((resolve, reject) => { _ = { 0: resolve, 1: reject, resolve, reject } }), _);
}

function InvertedPromise() {
  let _ = undefined;
  return _ = new Promise((resolve, reject) => 
    Promise.resolve()
      .then(() => Object.assign(_, { resolve, reject })));
}