diff --git a/basics-10-styling-starting-setup/app.js b/basics-10-styling-starting-setup/app.js
index e69de29..3918c74 100644
--- a/basics-10-styling-starting-setup/app.js
+++ b/basics-10-styling-starting-setup/app.js
@@ -0,0 +1 @@
+"use strict";