从链式承诺返回映射数组

    function createDataSet(username, region, champion, amount) {

  var dataArray = []; //what I want to return, if possible with .map()

  return getUserId(username, region) //required for getUserMatchlist()
    .then(userId => {
      getUserMatchlist(userId, region, champion, amount); //returns an array of objects
    })
    .then(matchlist => {
      matchlist.forEach(match => {
        getMatchDetails(match.gameId.toString(), region) //uses the Id from the matchlist objects to make another api request for each object
          .then(res => {
            dataArray.push(res); //every res is also an object fetched individually from the api. 
            // I would like to return an array with all the res objects in the order they appear in
          })
          .catch(err => console.log(err));
      });
    });
}

我正在尝试将从多个API获取的数据发送到前端。但是,使用 .map() 不起作用,从我所读到的内容来看,与承诺不符。对我来说,归还物品的最佳方式是什么?(函数将在收到get请求时执行,并且 dataArray