diff --git a/src/spdm/views/index.vue b/src/spdm/views/index.vue
index 01dd1ba..8372ff7 100644
--- a/src/spdm/views/index.vue
+++ b/src/spdm/views/index.vue
@@ -14,7 +14,10 @@
       USER_INFO_DATA,
       jump: jumpFun
     }"
-    :plugins="[DocElementRectPlugin()]"
+    :plugins="[
+      DocElementRectPlugin(),
+      InstanceofPlugin(),
+    ]"
   />
 </template>
 
@@ -24,7 +27,7 @@ import { useRoute, useRouter } from 'vue-router';
 import WujieVue from "wujie-vue3";
 import Cookies from 'js-cookie';
 import { SPDM_URL } from '../config';
-import { DocElementRectPlugin } from 'wujie-polyfill';
+import { DocElementRectPlugin, InstanceofPlugin } from 'wujie-polyfill';
 
 const USER_INFO_DATA = Cookies.get('cid_user_info');
 const USER_ID = Cookies.get('cid_user_id');
diff --git a/src/spdm/views/preview.vue b/src/spdm/views/preview.vue
index 83e653b..f51f07f 100644
--- a/src/spdm/views/preview.vue
+++ b/src/spdm/views/preview.vue
@@ -14,7 +14,10 @@
       USER_INFO_DATA,
       VIEW_MODE: 'preview'
     }"
-    :plugins="[DocElementRectPlugin()]"
+    :plugins="[
+      DocElementRectPlugin(),
+      InstanceofPlugin(),
+    ]"
   />
 </template>
 
@@ -23,7 +26,7 @@ import { watch } from 'vue';
 import WujieVue from 'wujie-vue3';
 import Cookies from 'js-cookie';
 import { SPDM_URL } from '../config';
-import { DocElementRectPlugin } from 'wujie-polyfill';
+import { DocElementRectPlugin, InstanceofPlugin } from 'wujie-polyfill';
 
 const emit = defineEmits(['load']);
 const { bus } = WujieVue;