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Async·medium 18 min 75 XP

Sequential Fetching

Write fetchSequential(ids, fetcher) that awaits fetcher(id) for each id one at a time, in order, returning the results array.

Examples

  • fetchSequential([1,2], fetcher) awaits fetcher(1) fully before calling fetcher(2)

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
Sequential Fetching · editor

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