diff --git a/test/browser/demo/index.html b/test/browser/demo/index.html
index cca3f8e..b97ef82 100644
--- a/test/browser/demo/index.html
+++ b/test/browser/demo/index.html
@@ -64,6 +64,7 @@
   <legend>选择文件、把文件/文件夹拖进来、截图直接 Ctrl + V</legend>
   <button id="upload"><i class="fa fa-cloud-upload"></i> Upload</button>
   <button id="camera"><i class="fa fa-video-camera"></i> Record Video</button>
+  <button id="screen" disabled><i class="fa fa-desktop"></i> Share Screen</button>
   <input type="file" id="file" multiple hidden/>
 </fieldset>