fix(tree-menu): [tree-menu] Fix the issue of asynchronous loading of tree-menu component (#1362)

examples/sites/demos/pc/app/tree-menu/webdoc/tree-menu.js

@@ -467,7 +467,7 @@ export default {
             'zh-CN': '自定义获取服务端数据源的方法，返回一个 Promise 对象',
             'en-US': 'Customize the method for obtaining server-side data sources and return a Promise object'
           },
-          'demoId': 'get-menu-data-sync'
+          'demoId': 'data-resource'
         },
         {
           'name': 'indent',

packages/renderless/src/tree-menu/index.ts

@@ -12,14 +12,14 @@
 
 export const initData =
   ({ state, props, service, api }) =>
-  () => {
+  async () => {
     if (props.data) {
       state.data = props.data
       return
     }
 
     if (typeof service.getMenuDataSync === 'function') {
-      const menuData = service.getMenuDataSync()
+      const menuData = await service.getMenuDataSync()
 
       state.data = api.setMenuKey({ newData: [], menuData })
     }