JavaScript Promise Patterns: All, AllSettled, Any, Race and Concurrency Control

A DEV Community guide explains how developers can go beyond basic Promise usage in modern JavaScript. It outlines error handling approaches, including try/catch with async/await and a reusable pattern returning data and error pairs. It compares Promise.all, Promise.allSettled, Promise.any and Promise.race, describing when each one suits a given scenario. The article also recommends limiting concurrency rather than firing many requests at once, and shows how to add timeouts, retries and cancellation via AbortSignal. Firefox is noted as fully implementing the Promise specification and its static API.