When would you use Promise.all, allSettled, race, or any?

Chooses promise combinators by success criteria, failure semantics, cancellation needs, and the fate of losing operations.

1Say itAnswer out loud first

2CompareCompare with Core answer

3RefineRefine with Stronger and Advanced

TL;DR

I use Promise.all when every result is required and one rejection should fail the combined promise. allSettled is for collecting every outcome. race settles with the first promise to settle, whether fulfilled or rejected. any fulfills with the first success and rejects only if every input rejects. The choice follows the feature's success and failure rule.

Full answer below

Practice focus

Whether the candidate maps combinator behavior to product intent rather than recalling method names.

Answer first

Answer path

Core answer first, then checkpoints toward a stronger answer.

Start
Core answer
Start here. This is the direct spoken answer to practice first.
Overview
The decision starts with what counts as success. None of these combinators automatically cancels the operations that no longer matter.
I use Promise.all when every result is required and one rejection should fail the combined promise. allSettled is for collecting every outcome. race settles with the first promise to settle, whether fulfilled or rejected. any fulfills with the first success and rejects only if every input rejects. The choice follows the feature's success and failure rule.
Checkpoint
Stronger answer
Optional upgrade with examples, trade-offs, and sharper phrasing.

Review signals

Use these to catch weak phrasing, shallow reasoning, and risky claims.

Common mistakesCandidateCommon mistakesMistakes that weaken the answer or signal shallow understanding.Open details

Details

Saying race returns the first successful result.
Saying Promise.all cancels remaining work after a rejection.
Using allSettled and then ignoring failed results.

When would you use Promise.all, allSettled, race, or any?

Practice focus

Answer path

Overview

Review signals

Follow-up prompts

Continue practice

Next in path

Prerequisite

Skill areas

Human editorial direction

Was this drill useful?

Found this answer useful?