<!DOCTYPE html> <html> <head> <title>MdDemo</title> <%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track' => true %> <%= javascript_include_tag 'application', 'data-turbolinks-track' => true %> <%= csrf_meta_tags %> <meta name="viewport" content="width=device-width, initial-scale=1"> </head> <body> <%= yield %> </body> </html>