Implementing Promise.all and Promise.allSettled

Promise.js

const promiseAll = (promises) => {
  return new Promise((resolve, reject) => {
    let results = [];
    let completed = 0;

    promises.forEach((promise, index) => {
      promise
        .then((value) => {
          completed += 1;
          results[index] = { status: "fulfilled", value };
        })
        .catch(error => {
          reject(error)
        })
        .finally(() => {
          if (completed === promises.length) {
            resolve(results);
          }
        });
    });
  });
};

const promiseAllSettled = (promises) => {
  return new Promise((resolve) => {
    let results = [];
    let completed = 0;

    promises.forEach((promise, index) => {
      promise
        .then((value) => {
          results[index] = { status: "fulfilled", value };
        })
        .catch((reason) => {
          results[index] = { status: "rejected", reason };
        })
        .finally(() => {
          completed += 1;

          if (completed === promises.length) {
            resolve(results);
          }
        });
    });
  });
};