feat(web): add mobile theme toggle (#274)

apps/web/app/(marketing)/_components/site-header-account-section.tsx

@@ -21,6 +21,12 @@ const ModeToggle = dynamic(() =>
   })),
 );
 
+const MobileModeToggle = dynamic(() =>
+  import('@kit/ui/mobile-mode-toggle').then((mod) => ({
+    default: mod.MobileModeToggle,
+  })),
+);
+
 const paths = {
   home: pathsConfig.app.home,
 };
@@ -57,6 +63,12 @@ function AuthButtons() {
         </If>
       </div>
 
+      <div className={'md:hidden'}>
+        <If condition={features.enableThemeToggle}>
+          <MobileModeToggle />
+        </If>
+      </div>
+
       <div className={'flex gap-x-2.5'}>
         <Button className={'hidden md:block'} asChild variant={'ghost'}>
           <Link href={pathsConfig.auth.signIn}>

packages/ui/package.json

@@ -119,6 +119,7 @@
     "./loading-overlay": "./src/makerkit/loading-overlay.tsx",
     "./profile-avatar": "./src/makerkit/profile-avatar.tsx",
     "./mode-toggle": "./src/makerkit/mode-toggle.tsx",
+    "./mobile-mode-toggle": "./src/makerkit/mobile-mode-toggle.tsx",
     "./enhanced-data-table": "./src/makerkit/data-table.tsx",
     "./language-selector": "./src/makerkit/language-selector.tsx",
     "./stepper": "./src/makerkit/stepper.tsx",

packages/ui/src/makerkit/mobile-mode-toggle.tsx

@@ -0,0 +1,35 @@
+'use client';
+
+import { Moon, Sun } from 'lucide-react';
+import { useTheme } from 'next-themes';
+
+import { cn } from '../lib/utils';
+import { Button } from '../shadcn/button';
+
+export function MobileModeToggle(props: { className?: string }) {
+  const { resolvedTheme, setTheme } = useTheme();
+
+  const toggleTheme = () => {
+    const next = resolvedTheme === 'dark' ? 'light' : 'dark';
+    setTheme(next);
+    setCookieTheme(next);
+  };
+
+  return (
+    <Button
+      variant="ghost"
+      size="icon"
+      aria-label="Toggle theme"
+      className={cn(props.className)}
+      onClick={toggleTheme}
+    >
+      <Sun className="h-[0.9rem] w-[0.9rem] scale-100 rotate-0 transition-all dark:scale-0 dark:-rotate-90" />
+      <Moon className="absolute h-[0.9rem] w-[0.9rem] scale-0 rotate-90 transition-all dark:scale-100 dark:rotate-0" />
+      <span className="sr-only">Toggle theme</span>
+    </Button>
+  );
+}
+
+function setCookieTheme(theme: string) {
+  document.cookie = `theme=${theme}; path=/; max-age=31536000`;
+}