<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">

  <title>{% if page.title %}{{ page.title }}{% else %}{{ site.title }}{% endif %}</title>
  <meta name="description" content="{% if page.excerpt %}{{ page.excerpt | strip_html | strip_newlines | truncate: 160 }}{% else %}{{ site.description }}{% endif %}">

  <link href="https://fonts.googleapis.com/css?family=Secular+One|Nunito|Ubuntu+Mono" rel="stylesheet"> 
  <link rel="stylesheet" href="{{ "/css/main.css" | prepend: site.baseurl }}">
  <link rel="canonical" href="{{ page.url | replace:'index.html','' | prepend: site.baseurl | prepend: site.url }}">
  <link rel="alternate" type="application/rss+xml" title="{{ site.title }}" href="{{ "/feed.xml" | prepend: site.baseurl | prepend: site.url }}" />

  <script src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML" type="text/javascript"></script>

  <script>
    var channel = new BroadcastChannel('egg');

    channel.addEventListener('message', message => {
      alert('Got a message from the other tab:\n' + message.data);
    });
  </script>
</head>