Promise.race() - JavaScript | MDN
6
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6
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2026-07-18 09:18:20
First whispered
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Text Highlight2026-07-18 15:42:20
Original Highlight Excerpt
"Promise.race takes the first settled Promise."
Whisper Note
That's the whole point, but people always confuse it with the first resolved one.
Text Highlight2026-07-18 12:39:20
Original Highlight Excerpt
"An empty iterable causes the returned promise to be forever pending"
Whisper Note
Makes sense, nothing to race means no winner, so it just waits.
Text Highlight2026-07-18 12:30:20
Original Highlight Excerpt
"An empty iterable causes the returned promise to be forever pending"
Whisper Note
So an empty array just hangs forever? That's a nasty gotcha.
Text Highlight2026-07-18 09:36:20
Original Highlight Excerpt
"Promise.race is always asynchronous: it never settles synchronously, even when the iterable is empty."
Whisper Note
Makes sense though, keeps behavior consistent across all cases.
Text Highlight2026-07-18 09:27:20
Original Highlight Excerpt
"Promise.race is always asynchronous: it never settles synchronously, even when the iterable is empty."
Whisper Note
Good to know, I always assumed empty meant instant reject.
Text Highlight2026-07-18 09:18:20
Original Highlight Excerpt
"Promise.race is always asynchronous: it never settles synchronously, even when the iterable is empty."
Whisper Note
Wait, so even an empty array still waits a tick? That's wild.
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