Array grouping
Newly available since 2024-03-05
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.
Learn more
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)
~2.110% of page loads. More data at chromestatus.
View as JSON | Edit this feature | Report an issue | Web-features entry: source, dist