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Async·medium 18 min 75 XP

Promise.all Aggregation

Write sumResolved(promises) that awaits every Promise in the array concurrently and returns their sum.

Examples

  • sumResolved([Promise.resolve(1), Promise.resolve(2)]) resolves to 3

Constraints

  • Keep the required function name so the tests can find it
  • Return a value instead of only logging it
  • Do not mutate inputs unless the challenge asks you to
Promise.all Aggregation · editor

Code runs in an isolated Web Worker with a 3-second timeout — no DOM access, and it can never hang the page.