diff --git a/demo-shell-ng2/.gitignore b/demo-shell-ng2/.gitignore
index bbba2a0e4f..022350903b 100644
--- a/demo-shell-ng2/.gitignore
+++ b/demo-shell-ng2/.gitignore
@@ -1,6 +1,9 @@
 typings/
 node_modules/
 bower_components/
+app/**/*.js
+app/**/*.js.map
+!app/js/Polyline.js
 .idea
 dist/