fix: search input unresponsive when notFoundContent is null and no options match

When notFoundContent is null and search yields no matching options,
the search input was immediately clearing typed characters.

Root cause: The useEffect that clears searchValue on dropdown close
was triggering even when the dropdown was forced closed by emptyListContent,
not from an actual user close action.

Fix: Track the previous open state and emptyListContent via refs.
Only clear searchValue when the dropdown was actually open before
and emptyListContent is not preventing the dropdown from showing.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: barangezen

src/BaseSelect/index.tsx

@@ -431,10 +431,26 @@ const BaseSelect = React.forwardRef<BaseSelectRef, BaseSelectProps>((props, ref)
   };
 
   // Close will clean up single mode search text
+  // Use ref to avoid adding emptyListContent to dependencies
+  const emptyListContentRef = React.useRef(emptyListContent);
+  emptyListContentRef.current = emptyListContent;
+
+  const prevOpenRef = React.useRef(mergedOpen);
   React.useEffect(() => {
-    if (!mergedOpen && !multiple && mode !== 'combobox') {
+    // Only clean search value when dropdown actually closes (true -> false)
+    // Skip when emptyListContent is true - this means dropdown was forced closed
+    // due to no matching options and notFoundContent being null,
+    // user should still be able to continue typing
+    if (
+      prevOpenRef.current &&
+      !mergedOpen &&
+      !multiple &&
+      mode !== 'combobox' &&
+      !emptyListContentRef.current
+    ) {
       onInternalSearch('', false, false);
     }
+    prevOpenRef.current = mergedOpen;
   }, [mergedOpen]);
 
   // ============================ Disabled ============================

tests/Select.test.tsx

@@ -1997,6 +1997,35 @@ describe('Select.Basic', () => {
     expect(container.querySelector('.rc-select-dropdown-empty')).toBeFalsy();
   });
 
+  // https://github.com/react-component/select/issues/XXX
+  it('should allow typing when notFoundContent is null and no options match', () => {
+    const onSearch = jest.fn();
+    const { container } = render(
+      <Select showSearch notFoundContent={null} onSearch={onSearch}>
+        <Option value="jack">Jack</Option>
+        <Option value="lucy">Lucy</Option>
+      </Select>,
+    );
+
+    const input = container.querySelector('input');
+
+    // Type 'j' - should match 'Jack'
+    fireEvent.change(input, { target: { value: 'j' } });
+    expect(onSearch).toHaveBeenLastCalledWith('j');
+    expect(input.value).toBe('j');
+    expect(container.querySelectorAll('.rc-select-item-option')).toHaveLength(1);
+
+    // Type 'x' - no match, but input should still work
+    fireEvent.change(input, { target: { value: 'x' } });
+    expect(onSearch).toHaveBeenLastCalledWith('x');
+    expect(input.value).toBe('x');
+
+    // Type more characters - should continue working
+    fireEvent.change(input, { target: { value: 'xyz' } });
+    expect(onSearch).toHaveBeenLastCalledWith('xyz');
+    expect(input.value).toBe('xyz');
+  });
+
   it('click outside to close select', () => {
     jest.useFakeTimers();