diff --git a/demo.html b/demo.html
index 15b5fe1..9be5498 100644
--- a/demo.html
+++ b/demo.html
@@ -17,9 +17,8 @@
       - [] true
     </textarea>
     <textarea class="md-content">
-    ```
-      <div>??--->>><<<</div>
-      <meta charset="UTF-8" />
+    
+    ```plaintext
       function(){
         return new Promise((resolve)=>{
           resolve(111)