diff --git a/demo.html b/demo.html
index 8f02ae3..b652a57 100644
--- a/demo.html
+++ b/demo.html
@@ -17,6 +17,18 @@
       </code>
     </pre>
     <hr />
+    <div class="md-content">
+      
+```
+<div>??--->>><<<</div>
+<meta charset="UTF-8" />
+function(){
+  return new Promise((resolve)=>{
+    resolve(111)
+  })
+}
+```
+    </div>
     <textarea rows="100" cols="50" class="md-content">
 * 列表