diff --git a/src/core/index.js b/src/core/index.js
index 53a8cd755..2c85e1eda 100644
--- a/src/core/index.js
+++ b/src/core/index.js
@@ -1,4 +1,3 @@
-
 import * as base from "./2.base";
 import * as ob from "./3.ob";
 import * as widget from "./4.widget";
@@ -7,10 +6,10 @@ import * as action from "./action";
 import * as behavior from "./behavior";
 import * as controllers from "./controller";
 import * as func from "./func";
-import { StyleLoaderManager } from "./loader/loader.style";
+import {StyleLoaderManager} from "./loader/loader.style";
 import "./h";
-import { ShowListener } from "./listener/listener.show";
-import { shortcut } from "./decorator";
+import {ShowListener} from "./listener/listener.show";
+import {shortcut} from "./decorator";
 
 export * from "./2.base";
 export * from "./3.ob";
@@ -20,12 +19,13 @@ export * from "./action";
 export * from "./behavior";
 export * from "./controller";
 export * from "./func";
+export * from "./structure";
 
 export {
     StyleLoaderManager,
     ShowListener,
     shortcut,
-}
+};
 
 Object.assign(BI, {
     ...base,