react-spectrum

dda1be5a - fix: allow null value in ComboBox validate for single selection (#9742)

fix: allow null value in ComboBox validate for single selection (#9742) Since ComboBox supports allowsCustomValue, the validate function can be called with an empty selection in single mode. Update ValidationType to include null for single selection to match the runtime behavior. Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>