如何获取并发流中每个任务的响应？

const createpool = (task, { concurrency } = {}) => {
  let runningcount = 0;
  const pool = [];
  const promisemap = new map();

  return function (i) {
    return new promise((resolve, reject) => {
      promisemap.set(i, { resolve, reject });

      pool.push(() => task(i));

      function run() {
        while (pool.length && runningcount < concurrency) {
          const runtask = pool.shift();
          runningcount++;
          runtask()
            .then((val) => {
              const { resolve } = promisemap.get(val)
              resolve(val)
            })
            .catch((e) => reject(e))
            .finally(() => {
              runningcount--;
              run();
            });
        }
      }
      run();
    });
  };
};

  for (let i = 0; i < 100; i++) {
    fetchData(i).then((response) => {
      console.log("response ---", response);
    });
  }