Add loading component for dynamicImport

config/config.js

@@ -19,7 +19,9 @@ export default {
           default: 'zh-CN', // default zh-CN
           baseNavigator: true, // default true, when it is true, will use `navigator.language` overwrite default
         },
-        dynamicImport: true,
+        dynamicImport: {
+          loadingComponent: './components/PageLoading/index',
+        },
         polyfills: ['ie11'],
         ...(!process.env.TEST && os.platform() === 'darwin'
           ? {

src/components/PageLoading/index.js

+import React from 'react';
+import { Spin } from 'antd';
+
+// loading components from code split
+// https://umijs.org/plugin/umi-plugin-react.html#dynamicimport
+export default () => (
+  <div style={{ paddingTop: 100, textAlign: 'center' }}>
+    <Spin size="large" />
+  </div>
+);