themes and dimensions

hooks/useDarkMode.ts

@@ -0,0 +1,23 @@
+import { useEffect, useState } from "react";
+
+function useDarkMode() {
+  const [theme, setTheme] = useState(
+    typeof window !== "undefined" ? localStorage.theme : "dark"
+  );
+  const colorTheme = theme === "dark" ? "light" : "dark";
+
+  useEffect(() => {
+    const root = window.document.documentElement;
+
+    root.classList.remove(colorTheme);
+    root.classList.add(theme);
+
+    if (typeof window !== "undefined") {
+      localStorage.setItem("theme", theme);
+    }
+  }, [theme]);
+
+  return [colorTheme, setTheme];
+}
+
+export default useDarkMode;