Files
hextra_mirror/layouts/_partials/head.html

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<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
{{- $noindex := .Params.noindex | default false -}}
{{ if and (hugo.IsProduction) (not $noindex) -}}
<meta name="robots" content="index, follow" />
{{ else -}}
<meta name="robots" content="noindex, nofollow" />
{{ end -}}
{{ partialCached "favicons.html" . -}}
<title>
{{- if .IsHome -}}
{{ .Site.Title -}}
{{ else -}}
{{ with .Title }}{{ . }} {{ end -}}
{{ .Site.Title -}}
{{ end -}}
</title>
<meta name="description" content="{{ partial "utils/page-description.html" . }}" />
{{- with .Params.canonical -}}
<link rel="canonical" href="{{ . }}" itemprop="url" />
{{- else -}}
<link rel="canonical" href="{{ .Permalink }}" itemprop="url" />
{{- end -}}
{{- partial "opengraph.html" . -}}
{{- partial "schema.html" . -}}
{{- partial "twitter_cards.html" . -}}
{{- $mainCss := resources.Get "css/compiled/main.css" -}}
{{- $customCss := resources.Get "css/custom.css" -}}
{{- $variablesCss := resources.Get "css/variables.css" | resources.ExecuteAsTemplate "css/variables.css" . -}}
{{- /* Production build */ -}}
{{- if hugo.IsProduction }}
{{- $styles := slice $variablesCss $mainCss $customCss | resources.Concat "css/compiled/main.css" | minify | fingerprint }}
<link rel="preload" href="{{ $styles.RelPermalink }}" as="style" integrity="{{ $styles.Data.Integrity }}" />
<link href="{{ $styles.RelPermalink }}" rel="stylesheet" integrity="{{ $styles.Data.Integrity }}" />
{{- /* Theme development mode (non-production + theme environment) */ -}}
{{- else if eq hugo.Environment "theme" }}
{{- $devStyles := resources.Get "css/styles.css" | postCSS (dict "inlineImports" true) }}
<link href="{{ $devStyles.RelPermalink }}" rel="stylesheet" />
<link href="{{ $variablesCss.RelPermalink }}" rel="stylesheet" />
<link href="{{ $customCss.RelPermalink }}" rel="stylesheet" />
{{- /* User local development */ -}}
{{- else }}
{{- $styles := resources.Get "css/compiled/main.css" -}}
<link href="{{ $styles.RelPermalink }}" rel="stylesheet" />
<link href="{{ $variablesCss.RelPermalink }}" rel="stylesheet" />
<link href="{{ $customCss.RelPermalink }}" rel="stylesheet" />
{{- end }}
<!-- Google Analytics -->
{{- if and hugo.IsProduction .Site.Config.Services.GoogleAnalytics.ID }}
<link rel="preconnect" href="https://www.googletagmanager.com" crossorigin />
{{ partial "google-analytics.html" . -}}
{{- end }}
<script>
// The section must not be in the theme.js file because it can create a quick flash (switch between light and dark).
function setTheme(theme) {
document.documentElement.classList.remove("light", "dark");
if (theme !== "light" && theme !== "dark") {
theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light";
}
document.documentElement.classList.add(theme);
document.documentElement.style.colorScheme = theme;
}
setTheme("color-theme" in localStorage ? localStorage.getItem("color-theme") : '{{ site.Params.theme.default | default `system`}}')
</script>
<!-- Math engine -->
{{ $noop := .WordCount -}}
{{- $engine := site.Params.math.engine | default "katex" -}}
{{ if and (.Page.Store.Get "hasMath") (eq $engine "katex") -}}
{{ partialCached "scripts/katex.html" . -}}
{{ else if and (.Page.Store.Get "hasMath") (eq $engine "mathjax") -}}
{{ partialCached "scripts/mathjax.html" . -}}
{{ end -}}
{{ partial "utils/page-width-override.html" . }}
{{ partial "custom/head-end.html" . -}}
</head>