React's Activity Component: Hide UI Without Losing Its State
React 19.2's Activity component hides a subtree instead of unmounting it, so state, scroll position, and DOM survive the round trip. Here's how it beh...
Aug 18, 2026
3 min
React 19.2's Activity component hides a subtree instead of unmounting it, so state, scroll position, and DOM survive the round trip. Here's how it beh...