Update index.html

src/index.html

@@ -10,6 +10,10 @@
   <script>
     window.onerror = function(message, source, lineno, colno, error) { 
       alert(message);
+      alert(source);
+      alert(lineno);
+      alert(colno);
+      alert(error);
     }
   </script>
   <!-- Global site tag (gtag.js) - Google Analytics -->