rustdoc: reduce size of <head> with preload loop

notriddle · notriddle · commit dac788f0a148 · 2024-04-09T16:31:26.000-07:00
diff --git a/src/librustdoc/html/templates/page.html b/src/librustdoc/html/templates/page.html
@@ -6,13 +6,10 @@
     <meta name="generator" content="rustdoc"> {# #}
     <meta name="description" content="{{page.description}}"> {# #}
     <title>{{page.title}}</title> {# #}
-    <script> if (window.location.protocol !== "file:") document.write(` {# Hack to skip preloading fonts locally - see #98769 #}
-    <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.source_serif_4_regular}}"> {# #}
-    <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.fira_sans_regular}}"> {# #}
-    <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.fira_sans_medium}}"> {# #}
-    <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.source_code_pro_regular}}"> {# #}
-    <link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}{{files.source_code_pro_semibold}}"> {# #}
-    `)</script> {# #}
+    <script>if(window.location.protocol!=="file:") {# Hack to skip preloading fonts locally - see #98769 #}
+    for(f of "{{files.source_serif_4_regular}},{{files.fira_sans_regular}},{{files.fira_sans_medium}},{{files.source_code_pro_regular}},{{files.source_code_pro_semibold}}".split(",")) {# #}
+     document.write(`<link rel="preload" as="font" type="font/woff2" crossorigin href="{{static_root_path|safe}}${f}">`) {# #}
+    </script> {# #}
     <link rel="stylesheet" {#+ #}
           href="{{static_root_path|safe}}{{files.normalize_css}}"> {# #}
     <link rel="stylesheet" {#+ #}
@@ -114,13 +111,13 @@ <h2> {# #}
         <div class="version">{{+ display_krate_version_extra}}</div> {# #}
         {% endif %}
         {% else %}
-        <div class="src-sidebar-title">
+        <div class="src-sidebar-title"> {# #}
             <h2>Files</h2> {# #}
         </div> {# #}
         {% endif %}
         {{ sidebar|safe }}
     </nav> {# #}
-    <div class="sidebar-resizer"></div>
+    <div class="sidebar-resizer"></div> {# #}
     <main> {# #}
         {% if page.css_class != "src" %}<div class="width-limiter">{% endif %}
             <nav class="sub"> {# #}
