clean up code

Revert "make navbar sticky"

This reverts commit 72d40a3005.

clean up code

make navbar sticky

layouts/partials/sections/header.html

@@ -1,25 +1,22 @@
-{{- /* theme-toggle is enabled */}}
-{{- if (not .Site.Params.theme.disableThemeToggle | default false) }}
 {{- /* theme is auto */}}
 <script>
-    if (localStorage.getItem("pref-theme") === "dark") {
-        document.body.classList.add('dark');
-    } else if (localStorage.getItem("pref-theme") === "light") {
-        document.body.classList.remove('dark')
-    } else if (window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches) {
-        document.body.classList.add('dark');
-    }
+    let localStorageValue = localStorage.getItem("pref-theme");
+    let mediaQuery = window.matchMedia('(prefers-color-scheme: dark)').matches;
 
-</script>
-{{- /* theme-toggle is disabled and theme is auto */}}
-{{- else if (and (ne .Site.Params.theme.defaultTheme "light") (ne .Site.Params.theme.defaultTheme "dark"))}}
-<script>
-    if (window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches) {
-        document.body.classList.add('dark');
+    switch (localStorageValue) {
+        case "dark":
+            document.body.classList.add('dark');
+            break;
+        case "light":
+            document.body.classList.remove('dark');
+            break;
+        default:
+            if (mediaQuery) {
+                document.body.classList.add('dark');
+            }
+            break;
     }
-
 </script>
-{{- end }}
 
 
 <!-- Navbar -->