revert commit

Author: OysterD3

docs/examples/dynamic-extra.tsx

@@ -1,7 +1,7 @@
 import React from 'react';
-import '../../assets/index.less';
-import type { TabsProps } from '../../src';
 import Tabs from '../../src';
+import type { TabsProps } from '../../src';
+import '../../assets/index.less';
 
 const items: TabsProps['items'] = [];
 for (let i = 0; i < 50; i += 1) {
@@ -16,20 +16,22 @@ export default () => {
 
   const extra = React.useMemo(() => {
     if (key === '0') {
-      return <div>额外内容</div>;
-    }
-    return null;
-  }, [key]);
+      return (
+        <div>额外内容</div>
+      )
+    } 
+    return null
+  }, [key])
 
   return (
     <div style={{ maxWidth: 550 }}>
-      <Tabs
+      <Tabs 
         activeKey={key}
-        onChange={curKey => setKey(curKey)}
-        tabBarExtraContent={extra}
-        defaultActiveKey="8"
-        items={items}
+        onChange={(curKey) => setKey(curKey)}
+        tabBarExtraContent={extra} 
+        defaultActiveKey="8" 
+        items={items} 
       />
     </div>
   );
-};
+};