CodeParkconst slowOk = new Promise((res) => setTimeout(() => res("slow ok"), 100));
const fastFail = new Promise((_, rej) =>
setTimeout(() => rej(new Error("fast fail")), 10)
);
Promise.race([slowOk, fastFail]).then(
(v) => console.log("race:", v),
(e) => console.log("race:", e.message)
);
Promise.any([slowOk, fastFail]).then((v) => console.log("any:", v));
race: fast fail, then any: slow ok
The answer is "race: fast fail, then any: slow ok". race settles with whichever promise settles first, even a rejection. fastFail rejects after 10 ms, so race reports fast fail. any ignores rejections and waits for the first success, which is slow ok.
The tempting option "race: fast fail, then an AggregateError from any" is wrong. any rejects with an AggregateError only if every promise rejects, and slowOk fulfills.
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