The **promises‑all** library is a small Node.js utility that runs multiple promise‑based functions in parallel and returns a single result object containing separate arrays for the fulfilled and rejected values. Unlike the native `Promise.all`, it only rejects the whole call when the wrapper itself errors, making it useful for developers who need to fire several asynchronous operations (e.g., API calls) and handle individual successes and failures without aborting the entire batch.