实现Promise.race

Question

const promiseRace = promises => new Promise(((resolve, reject) => {
  promises.forEach(promise => {
    promise.then(res => {
      resolve(res);
    });

    promise.catch(rej => {
      reject(rej);
    });
  });
}));

执行后出现错误：未处理的拒绝。如何解决问题？