<html> <head> <link rel="stylesheet" href="pico.min.css" /> <link rel="stylesheet" href="style.css" /> <meta charset="UTF-8"> </head> <body> <div class="container"> <button onclick='openAll();'>Open all</button> <button onclick='closeAll();'>Close all</button> <h1>{{title}}</h1> {{content}} </div> <script> </script> </body> </html>