useDeferredValue is a React Hook that returns a deferred version of a value, allowing work that depends on it to update at lower priority. section 7.1.5
Keep the interface responsive during spell checking
A spell-check button should respond immediately, while highlighting spelling errors in a document can trail the click by several render cycles. Deferring the highlighting work separates the urgent button update from the lower-priority document update. section 7.1.5
useDeferredValue is one of React’s stateful hooks and works within React’s Concurrent Mode. Its behavior is advanced; detailed implementation guidance is deferred to further references. section 7.0 section 7.1.5
