diff --git a/demo.html b/demo.html
index 7034249..dfa3490 100644
--- a/demo.html
+++ b/demo.html
@@ -92,7 +92,7 @@
           //   code.innerHTML = hightlightHtml
           // })
           textarea.parentNode.insertBefore(newDiv, textarea.nextSibling)
-          // textarea.style.display = 'none'
+          textarea.style.display = 'none'
         })
       }
       createLink(highLightCss)