fix: enable spacebar to be typed in opened mode

Author: claytonlin1110

src/BaseSelect/index.tsx

@@ -468,7 +468,6 @@ const BaseSelect = React.forwardRef<BaseSelectRef, BaseSelectProps>((props, ref)
     const isEnterKey = key === 'Enter';
     const isSpaceKey = key === ' ';
 
-    // Enter or Space opens dropdown (ARIA combobox: spacebar should open)
     if (isEnterKey || isSpaceKey) {
       // Do not submit form when type in the input; prevent Space from scrolling page
       const isCombobox = mode === 'combobox';
@@ -479,6 +478,10 @@ const BaseSelect = React.forwardRef<BaseSelectRef, BaseSelectProps>((props, ref)
 
       // We only manage open state here, close logic should handle by list component
       if (!mergedOpen) {
+        // Do not submit form when type in the input
+        if (mode !== 'combobox') {
+          event.preventDefault();
+        }
         triggerOpen(true);
       }
     }