Live coding: implement a polyfill for the Promise.all method, including preserving the order of results.

The implementation of a polyfill for Promise.all should accept an array of promises and return a new promise that:

• resolves when all promises in the array resolve,
• rejects if any of the promises reject,
• maintains the order of results according to the order of the input promises.

function promiseAll(promises) {
  return new Promise((resolve, reject) => {
    if (!Array.isArray(promises)) {
      return reject(new TypeError('Argument must be an array'));
    }
    const results = [];
    let completed = 0;
    const total = promises.length;

    if (total === 0) {
      return resolve([]);
    }

    promises.forEach((p, index) => {
      Promise.resolve(p)
        .then(value => {
          results[index] = value;
          completed += 1;
          if (completed === total) {
            resolve(results);
          }
        })
        .catch(err => {
          reject(err);
        });
    });
  });
}

This code handles both promises and regular values (via Promise.resolve), carefully maintains the order of results, and correctly handles errors.