<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"></script>
+ <%= stylesheet_link_tag 'application', media: 'all' %>
+ <%= javascript_include_tag 'application' %>
+
+ <%= javascript_pack_tag "application" %>
<%= stylesheet_pack_tag "application" %>
</head>