Array grouping
The Object.groupBy() and Map.groupBy() static methods group values of arrays and iterables based on a function that returns a key for each value.
Status
Baseline Newly Available (since 2024-03-05)
This feature is expected to reach Baseline Widely Available status on: 2026-09-05
MDN documentation
Specifications
- ECMAScript® 2026 Language Specification (#sec-groupby), from TC39 (Ecma International).
Browser support
- Chrome 117 Released on 2023-09-12
- Chrome Android 117 Released on 2023-09-12
- Edge 117 Released on 2023-09-15
- Firefox 119 Released on 2023-10-24
- Firefox for Android 119 Released on 2023-10-24
- Safari 17.4 Released on 2024-03-05
- Safari on iOS 17.4 Released on 2024-03-05
Usage (according to Chrome Platform Status)
~2.291% of page loads. More data at chromestatus.
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