diff --git a/components/tabs/demo/slide.md b/components/tabs/demo/slide.md
index 39ed558739edcd8bd08866b9442a6c8319816198..0ee0eeff3f82d4bc9c2fc081538655531e59a21a 100644
--- a/components/tabs/demo/slide.md
+++ b/components/tabs/demo/slide.md
@@ -40,7 +40,7 @@ class SlidingTabsDemo extends React.Component {
           <Radio.Button value="left">Vertical</Radio.Button>
         </Radio.Group>
         <Tabs defaultActiveKey="1" tabPosition={mode} style={{ height: 220 }}>
-          {[...Array(30).keys()].map(i => (
+          {[...Array.from({ length: 30 }, (v, i) => i)].map(i => (
             <TabPane tab={`Tab-${i}`} key={i} disabled={i === 28}>
               Content of tab {i}
             </TabPane>