hugo-theme-even/layouts/partials/head.html

<meta name="renderer" content="webkit" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"/>

<meta http-equiv="Cache-Control" content="no-transform" />
<meta http-equiv="Cache-Control" content="no-siteapp" />

<meta name="theme-color" content="#f8f5ec" />
<meta name="msapplication-navbutton-color" content="#f8f5ec">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="#f8f5ec">

<!-- author & description & keywords  -->
<meta name="author" content="{{ if .Params.author }}{{ .Params.author | safeHTML }}{{ else }}{{ .Site.Author.name | safeHTML }}{{ end }}" />

{{- if .Description -}}
  <meta name="description" content="{{ .Description | safeHTML }}" />
{{ else if .IsPage }}
  <meta name="description" content="{{ .Summary | plainify }}" />
{{ else if .Site.Params.description }}
  <meta name="description" content="{{ .Site.Params.description | safeHTML }}" />
{{- end -}}

{{- if .Keywords -}}
  {{ $length := len .Keywords | add -1 -}}
  <meta name="keywords" content="{{ range $index, $element := .Keywords }}{{ $element | safeHTML }}{{if ne $index $length }}, {{ end }}{{ end }}" />
{{ else if .Site.Params.keywords }}
  {{ $length := len .Site.Params.keywords | add -1 -}}
  <meta name="keywords" content="{{ range $index, $element := .Site.Params.keywords }}{{ $element | safeHTML }}{{if ne $index $length }}, {{ end }}{{ end }}" />
{{- end }}

<!-- baidu & google verification  -->
{{ with .Site.Params.baidu_verification }}<meta name="baidu-site-verification" content="{{.}}" />{{ end }}
{{ with .Site.Params.google_verification }}<meta name="google-site-verification" content="{{.}}" />{{ end }}

<!-- Site Generator -->
<meta name="generator" content="Hugo {{ .Hugo.Version }}" />

<!-- Permalink & RSSlink -->
<link rel="canonical" href="{{ .Permalink }}" />
{{ if .RSSLink -}}
  <link href="{{ .RSSLink }}" rel="alternate" type="application/rss+xml" title="{{ .Site.Title }}" />
  <link href="{{ .RSSLink }}" rel="feed" type="application/rss+xml" title="{{ .Site.Title }}" />
{{ end -}}

<!-- Favicon and Touch icons -->
<link rel="apple-touch-icon" sizes="180x180" href="{{ "apple-touch-icon.png" | relURL }}">
<link rel="icon" type="image/png" sizes="32x32" href="{{ "favicon-32x32.png" | relURL }}">
<link rel="icon" type="image/png" sizes="16x16" href="{{ "favicon-16x16.png" | relURL }}">
<link rel="icon" href="{{ "favicon.ico" | relURL }}" />
<link rel="manifest" href="{{ "manifest.json" | relURL }}">
<link rel="mask-icon" href="{{ "safari-pinned-tab.svg" | relURL }}" color="#5bbad5">

<!-- Styles -->
{{ $themeVersion := .Site.Params.version }}
<link href="{{ relURL (printf "dist/even.v%s.css" $themeVersion) }}" rel="stylesheet">
{{ if .Site.Params.bootcdn -}}
  {{ if .Site.Params.fancybox }}<link href="https://cdn.bootcss.com/fancybox/3.1.20/jquery.fancybox.min.css" rel="stylesheet">{{ end }}
{{ else -}}
  {{ if .Site.Params.fancybox }}<link href="{{ "lib/fancybox/jquery.fancybox-3.1.20.min.css" | relURL }}" rel="stylesheet">{{ end }}
{{- end }}

{{/* NOTE: These Hugo Internal Templates can be found starting at https://github.com/spf13/hugo/blob/master/tpl/tplimpl/template_embedded.go#L158 */}}
{{- template "_internal/opengraph.html" . -}}
{{- template "_internal/google_news.html" . -}}
{{- template "_internal/schema.html" . -}}
{{- template "_internal/twitter_cards.html" . -}}

<!-- Polyfill for old browsers -->
{{ `<!--[if lt IE 9]>
  <script src="https://cdn.bootcss.com/html5shiv/3.7.3/html5shiv.min.js"></script>
  <script src="https://cdn.bootcss.com/respond.js/1.4.2/respond.min.js"></script>
<![endif]-->` | safeHTML }}