fix: spaceKey preventDefault

docs/demo/search.md

@@ -0,0 +1,8 @@
+---
+title: search
+nav:
+  title: Demo
+  path: /demo
+---
+
+<code src="../examples/search.tsx"></code>

docs/examples/search.tsx

@@ -0,0 +1,18 @@
+import React from 'react';
+import Select, { Option } from '@rc-component/select';
+import '../../assets/index.less';
+
+const Demo = () => {
+  return (
+    <Select placeholder="placeholder" showSearch>
+      <Option value="11" text="lucy">
+        lucy
+      </Option>
+      <Option value="21" text="disabled">
+        disabled
+      </Option>
+    </Select>
+  );
+};
+
+export default Demo;

src/BaseSelect/index.tsx

@@ -463,15 +463,16 @@ const BaseSelect = React.forwardRef<BaseSelectRef, BaseSelectProps>((props, ref)
   // KeyDown
   const onInternalKeyDown: React.KeyboardEventHandler<HTMLDivElement> = (event) => {
     const clearLock = getClearLock();
-    const { key } = event;
+    const { key, target } = event;
 
     const isEnterKey = key === 'Enter';
     const isSpaceKey = key === ' ';
+    const isTypingInput = (target as HTMLElement)?.tagName === 'INPUT';
 
     // 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
-      if (mode !== 'combobox') {
+      if (!isTypingInput && mode !== 'combobox') {
         event.preventDefault();
       }