Stop writing reduce() just to group an array ✋
`Object.groupBy()` works on all major browsers, helping you group array elements by any key in one line.
Clean, readable, no dependencies.
Learn more 👇
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/groupBy
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The official MDN Web Docs account. We deliver the best web docs around. Visit → https://mdn.dev Contribute → https://mdn.dev/community
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@mdn@mastodon.social
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Mar 06, 2026
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