<html>
<head>
<link rel="stylesheet" href="pico.min.css" />
<link rel="stylesheet" href="style.css" />
</head>
<body>
<div class="container">
<button onclick='const details = document.querySelector("details");details.setAttribute("open", "");'>Open all</button>
<button onclick='const details = document.querySelector("details");details.removeAttribute("open", "");'>Close all</button>
<h1>{{title}}</h1>
{{content}}
</div>
</body>
</html>