Async Programming

How Does the Event Loop Order Microtasks and Macrotasks?

After each single macrotask finishes executing, the event loop fully drains the entire microtask queue — including any new microtasks scheduled during that dra…

Promise.all vs Promise.allSettled: When to Use Each?

Promise.all resolves with an array of values only if every input promise fulfills, and it rejects immediately with the first rejection reason if any one fails,…

Promise.race vs Promise.any: What Sets Them Apart?

Promise.race settles as soon as any one input promise settles — whether it fulfills or rejects — mirroring whatever that first promise did, while Promise.any s…