Initial commit from Create Next App

components/theme-switcher.tsx

@@ -0,0 +1,78 @@
+"use client";
+
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuRadioGroup,
+  DropdownMenuRadioItem,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+import { Laptop, Moon, Sun } from "lucide-react";
+import { useTheme } from "next-themes";
+import { useEffect, useState } from "react";
+
+const ThemeSwitcher = () => {
+  const [mounted, setMounted] = useState(false);
+  const { theme, setTheme } = useTheme();
+
+  // useEffect only runs on the client, so now we can safely show the UI
+  useEffect(() => {
+    setMounted(true);
+  }, []);
+
+  if (!mounted) {
+    return null;
+  }
+
+  const ICON_SIZE = 16;
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button variant="ghost" size={"sm"}>
+          {theme === "light" ? (
+            <Sun
+              key="light"
+              size={ICON_SIZE}
+              className={"text-muted-foreground"}
+            />
+          ) : theme === "dark" ? (
+            <Moon
+              key="dark"
+              size={ICON_SIZE}
+              className={"text-muted-foreground"}
+            />
+          ) : (
+            <Laptop
+              key="system"
+              size={ICON_SIZE}
+              className={"text-muted-foreground"}
+            />
+          )}
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent className="w-content" align="start">
+        <DropdownMenuRadioGroup
+          value={theme}
+          onValueChange={(e) => setTheme(e)}
+        >
+          <DropdownMenuRadioItem className="flex gap-2" value="light">
+            <Sun size={ICON_SIZE} className="text-muted-foreground" />{" "}
+            <span>Light</span>
+          </DropdownMenuRadioItem>
+          <DropdownMenuRadioItem className="flex gap-2" value="dark">
+            <Moon size={ICON_SIZE} className="text-muted-foreground" />{" "}
+            <span>Dark</span>
+          </DropdownMenuRadioItem>
+          <DropdownMenuRadioItem className="flex gap-2" value="system">
+            <Laptop size={ICON_SIZE} className="text-muted-foreground" />{" "}
+            <span>System</span>
+          </DropdownMenuRadioItem>
+        </DropdownMenuRadioGroup>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+};
+
+export { ThemeSwitcher };