a new start

_includes/head/links-static.html

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+{% if plugins contains 'jekyll-feed' %}{% include head/feed-tag.html %}{% endif %}
+
+<link rel="icon" type="image/png" href="/assets/icons/favicon-96x96.png" sizes="96x96" />
+<link rel="icon" type="image/svg+xml" href="/assets/icons/favicon.svg" />
+<link rel="shortcut icon" href="/assets/icons/favicon.ico" />
+<link rel="apple-touch-icon" sizes="180x180" href="/assets/icons/apple-touch-icon.png" />
+<link rel="manifest" href="/assets/icons/site.webmanifest" />
+
+{% if site.google_fonts %}
+  {%- capture google_fonts_url %}{{ site.google_fonts_url | default:'https://fonts.googleapis.com' }}{%- endcapture -%}
+  <link rel="dns-prefetch" href="{{ google_fonts_url }}" />
+  {%- if google_fonts_url == 'https://fonts.googleapis.com' -%}
+    <link rel="dns-prefetch" href="https://fonts.gstatic.com" />
+  {%- endif -%}
+{% endif %}
+
+{% if site.google_analytics %}
+  <link rel="dns-prefetch" href="https://www.google-analytics.com" />
+{% endif %}
+
+{% if site.kramdown.math_engine == 'katex' %}
+  {% capture katex_url %}{{ 'assets/bower_components/katex/dist/katex.min.css' | relative_url }}{% endcapture %}
+  <link rel="dns-prefetch" href="{{ katex_url }}" id="_katexPreload" />
+  <noscript><link rel="stylesheet" href="{{ katex_url }}"></noscript>
+{% endif %}
+
+{% assign disqus = site.disqus | default:site.disqus_shortname %}
+{% if disqus %}
+<link rel="dns-prefetch" href="https://{{ disqus }}.disqus.com" id="_hrefDisqus" />
+{% endif %}