fix

ui/react-example/index.html

@@ -7,6 +7,7 @@
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
   <title>React Git Diff Component</title>
   <link rel="stylesheet" href="https://fonts.cdnfonts.com/css/google-sans" />
+  <script src="https://unpkg.com/@ungap/[email protected]/min.js"></script>
   <meta name="description" content="github diff, github like, react diff component, diff component, git diff" />
   <style>
     html,