📃 January 2026 release notes

Widely available

The following features are now widely available:

• animation-composition: The animation-composition CSS property chooses how to combine animations that affect the same property.
• Array by copy: The toReversed(), toSorted(), toSpliced(), and with() methods of arrays and typed arrays return changed copies of arrays. They stand in contrast to methods such as sort() or reverse() that change arrays in place.