diff --git a/assets/js/main.js b/assets/js/main.js
new file mode 100644
index 000000000..f7f3515b7
--- /dev/null
+++ b/assets/js/main.js
@@ -0,0 +1,4 @@
+(function ($) {
+    // Update the HTML classes.
+    $('html.no-js').removeClass('no-js').addClass('js');
+})(jQuery);