dart-lang · adil192 · Jun 27, 2025 · Jun 27, 2025 · Jun 27, 2025 · Jun 27, 2025
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -2,6 +2,7 @@ Important changes to data models, configuration, and migrations between each
 AppEngine version, listed here to ease deployment and troubleshooting.
 
 ## Next Release (replace with git tag when deployed)
+ - Reduced flash of white while loading pages in dark mode.
 
 ## `20250626t093300-all`
  * Bump runtimeVersion to `2025.06.20`.

diff --git a/app/lib/dartdoc/dartdoc_page.dart b/app/lib/dartdoc/dartdoc_page.dart
@@ -102,6 +102,7 @@ extension DartDocPageRender on DartDocPage {
             name: 'viewport',
             content:
                 'width=device-width, height=device-height, initial-scale=1, user-scalable=no'),
+        d.meta(name: 'color-scheme', content: 'light dark'),
         d.meta(name: 'generator', content: 'made with love by dartdoc'),
         d.meta(name: 'description', content: description),
         d.element('title', text: _pageTitle(options)),
@@ -286,6 +287,7 @@ extension DartDocPageRender on DartDocPage {
     final dataBaseHref = p.relative('', from: p.dirname(options.path));
     return d.element('body', classes: [
       'light-theme',
+      'loading-theme',
     ], attributes: {
       'data-base-href':
           baseHref ?? (dataBaseHref == '.' ? '' : '$dataBaseHref/'),

diff --git a/app/lib/frontend/dom/dom.dart b/app/lib/frontend/dom/dom.dart
@@ -758,6 +758,7 @@ Node script({
   String? text,
   String? type,
   String? src,
+  String? blocking,
   bool async = false,
   bool defer = false,
   String? onload,
@@ -769,6 +770,7 @@ Node script({
       attributes: <String, String>{
         if (type != null) 'type': type,
         if (src != null) 'src': src,
+        if (blocking != null) 'blocking': blocking,
         if (async) 'async': 'async',
         if (defer) 'defer': 'defer',
         if (onload != null) 'onload': onload,

diff --git a/app/lib/frontend/templates/views/shared/layout.dart b/app/lib/frontend/templates/views/shared/layout.dart
@@ -59,6 +59,7 @@ d.Node pageLayoutNode({
               name: 'viewport',
               content: 'width=device-width, initial-scale=1',
             ),
+            d.meta(name: 'color-scheme', content: 'light dark'),
             if (noIndex) d.meta(name: 'robots', content: 'noindex'),
 
             // <!-- Twitter tags -->
@@ -183,6 +184,8 @@ d.Node pageLayoutNode({
             requestContext.experimentalFlags.isDarkModeDefault
                 ? 'dark-theme'
                 : 'light-theme',
+            // `loading-theme` will be removed by the dark-init.js script
+            'loading-theme',
           ],
           attributes: {
             if (activeConfiguration.isStaging) 'data-staging': '1',
@@ -191,7 +194,9 @@ d.Node pageLayoutNode({
             // The initialization of dark theme must be in a synchronous, blocking
             // script execution, as otherwise users may see flash of unstyled content
             // (usually white background instead of a dark theme).
-            d.script(src: staticUrls.getAssetUrl('/static/js/dark-init.js')),
+            d.script(
+                src: staticUrls.getAssetUrl('/static/js/dark-init.js'),
+                blocking: 'render'),
             if (activeConfiguration.isStaging)
               d.div(classes: ['staging-ribbon'], text: 'staging'),
             // <!-- Google Tag Manager (noscript) -->

diff --git a/app/test/frontend/golden/authorized_page.html b/app/test/frontend/golden/authorized_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/consent_page.html b/app/test/frontend/golden/consent_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/create_publisher_page.html b/app/test/frontend/golden/create_publisher_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/error_page.html b/app/test/frontend/golden/error_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/help_page.html b/app/test/frontend/golden/help_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>
     <meta name="twitter:description" content="Pub is the package manager for the Dart programming language, containing reusable libraries &amp; packages for Flutter and general Dart programs."/>

diff --git a/app/test/frontend/golden/landing_page.html b/app/test/frontend/golden/landing_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>
     <meta name="twitter:description" content="Pub is the package manager for the Dart programming language, containing reusable libraries &amp; packages for Flutter and general Dart programs."/>

diff --git a/app/test/frontend/golden/my_activity_log_page.html b/app/test/frontend/golden/my_activity_log_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/my_liked_packages.html b/app/test/frontend/golden/my_liked_packages.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/my_packages.html b/app/test/frontend/golden/my_packages.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/my_publishers.html b/app/test/frontend/golden/my_publishers.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_activity_log_page.html b/app/test/frontend/golden/pkg_activity_log_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_admin_page.html b/app/test/frontend/golden/pkg_admin_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_changelog_page.html b/app/test/frontend/golden/pkg_changelog_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_example_page.html b/app/test/frontend/golden/pkg_example_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_index_page.html b/app/test/frontend/golden/pkg_index_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_install_page.html b/app/test/frontend/golden/pkg_install_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_score_page.html b/app/test/frontend/golden/pkg_score_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_score_page_with_downloads_chart.html b/app/test/frontend/golden/pkg_score_page_with_downloads_chart.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_show_page.html b/app/test/frontend/golden/pkg_show_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_show_page_discontinued.html b/app/test/frontend/golden/pkg_show_page_discontinued.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_show_page_flutter_plugin.html b/app/test/frontend/golden/pkg_show_page_flutter_plugin.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_show_page_publisher.html b/app/test/frontend/golden/pkg_show_page_publisher.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_show_page_retracted.html b/app/test/frontend/golden/pkg_show_page_retracted.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_show_page_retracted_non_retracted_version.html b/app/test/frontend/golden/pkg_show_page_retracted_non_retracted_version.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_show_version_page.html b/app/test/frontend/golden/pkg_show_version_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/pkg_versions_page.html b/app/test/frontend/golden/pkg_versions_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>
     <meta name="twitter:description" content="Pub is the package manager for the Dart programming language, containing reusable libraries &amp; packages for Flutter and general Dart programs."/>

diff --git a/app/test/frontend/golden/publisher_activity_log_page.html b/app/test/frontend/golden/publisher_activity_log_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/publisher_admin_page.html b/app/test/frontend/golden/publisher_admin_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/publisher_list_page.html b/app/test/frontend/golden/publisher_list_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>
     <meta name="twitter:description" content="Pub is the package manager for the Dart programming language, containing reusable libraries &amp; packages for Flutter and general Dart programs."/>

diff --git a/app/test/frontend/golden/publisher_packages_page.html b/app/test/frontend/golden/publisher_packages_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>
     <meta name="twitter:description" content="Pub is the package manager for the Dart programming language, containing reusable libraries &amp; packages for Flutter and general Dart programs."/>

diff --git a/app/test/frontend/golden/publisher_unlisted_packages_page.html b/app/test/frontend/golden/publisher_unlisted_packages_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/report_page.html b/app/test/frontend/golden/report_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/report_page_appeal.html b/app/test/frontend/golden/report_page_appeal.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/search_page.html b/app/test/frontend/golden/search_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="robots" content="noindex"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>

diff --git a/app/test/frontend/golden/topics_page.html b/app/test/frontend/golden/topics_page.html
@@ -6,6 +6,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="x-ua-compatible" content="ie=edge"/>
     <meta name="viewport" content="width=device-width, initial-scale=1"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="twitter:card" content="summary"/>
     <meta name="twitter:site" content="@dart_lang"/>
     <meta name="twitter:description" content="Pub is the package manager for the Dart programming language, containing reusable libraries &amp; packages for Flutter and general Dart programs."/>

diff --git a/app/test/task/testdata/goldens/documentation/oxygen/1.0.0/index.html b/app/test/task/testdata/goldens/documentation/oxygen/1.0.0/index.html
@@ -7,6 +7,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
     <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, user-scalable=no"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="generator" content="made with love by dartdoc"/>
     <meta name="description" content="oxygen API docs, for the Dart programming language."/>
     <title>oxygen - Dart API docs</title>

diff --git a/app/test/task/testdata/goldens/documentation/oxygen/1.0.0/oxygen/MainClass-class.html b/app/test/task/testdata/goldens/documentation/oxygen/1.0.0/oxygen/MainClass-class.html
@@ -7,6 +7,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
     <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, user-scalable=no"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="generator" content="made with love by dartdoc"/>
     <meta name="description" content="API docs for the MainClass class from the oxygen library, for the Dart programming language."/>
     <title>MainClass class - oxygen library - Dart API</title>

diff --git a/app/test/task/testdata/goldens/documentation/oxygen/1.0.0/oxygen/MainClass/MainClass.html b/app/test/task/testdata/goldens/documentation/oxygen/1.0.0/oxygen/MainClass/MainClass.html
@@ -7,6 +7,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
     <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, user-scalable=no"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="generator" content="made with love by dartdoc"/>
     <meta name="description" content="API docs for the MainClass.new constructor from Class MainClass from the oxygen library, for the Dart programming language."/>
     <title>MainClass.new constructor - MainClass - oxygen library - Dart API</title>

diff --git a/app/test/task/testdata/goldens/documentation/oxygen/1.0.0/oxygen/MainClass/text.html b/app/test/task/testdata/goldens/documentation/oxygen/1.0.0/oxygen/MainClass/text.html
@@ -7,6 +7,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
     <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, user-scalable=no"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="generator" content="made with love by dartdoc"/>
     <meta name="description" content="API docs for the text property from the MainClass class, for the Dart programming language."/>
     <title>text property - MainClass class - oxygen library - Dart API</title>

diff --git a/app/test/task/testdata/goldens/documentation/oxygen/1.0.0/oxygen/MainClass/toLowerCase.html b/app/test/task/testdata/goldens/documentation/oxygen/1.0.0/oxygen/MainClass/toLowerCase.html
@@ -7,6 +7,7 @@
     <meta charset="utf-8"/>
     <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
     <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, user-scalable=no"/>
+    <meta name="color-scheme" content="light dark"/>
     <meta name="generator" content="made with love by dartdoc"/>
     <meta name="description" content="API docs for the toLowerCase method from the MainClass class, for the Dart programming language."/>
     <title>toLowerCase method - MainClass class - oxygen library - Dart API</title>