What does Promise.allSettled do in JavaScript?
It waits for all promises to settle (fulfilled or rejected) and returns an array of { status, value/reason } objects. It never rejects. Use it for partial success when you want all results regardless of failures.
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More FAQs in Promise.allSettled: Examples and Use Cases in JavaScript
Promise.all rejects if any promise rejects (fast fail) and returns an array of values. Promise.allSettled waits for all promises, never rejects, and returns an array of { status, value/reason } objects.
No. Promise.allSettled always fulfills. It returns an array of result objects, each with a status of 'fulfilled' or 'rejected'. This is why it is useful for partial success scenarios.
{ status: 'fulfilled', value: ... } for fulfilled promises, or { status: 'rejected', reason: ... } for rejected promises. Check r.status to determine which, then access r.value or r.reason.
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