monaco-editor-lsp-next/src/components/theme-toggle.tsx

"use client";

import { useTheme } from "next-themes";
import { useEffect, useState } from "react";
import { Button } from "@/components/ui/button";
import { MoonIcon, SunIcon } from "lucide-react";

export const ThemeToggle = () => {
  const { resolvedTheme, setTheme } = useTheme();
  const alternateTheme = resolvedTheme === "dark" ? "light" : "dark";
  const [mounted, setMounted] = useState(false);

  useEffect(() => {
    setMounted(true);
  }, []);

  return (
    <Button
      size="icon"
      variant="outline"
      onClick={() => setTheme(alternateTheme)}
      aria-label={
        mounted ? `Switch to ${alternateTheme} theme` : "Toggle theme"
      }
    >
      <MoonIcon
        size={16}
        className="shrink-0 scale-0 opacity-0 transition-all dark:scale-100 dark:opacity-100"
        aria-hidden="true"
      />
      <SunIcon
        size={16}
        className="absolute shrink-0 scale-100 opacity-100 transition-all dark:scale-0 dark:opacity-0"
        aria-hidden="true"
      />
    </Button>
  );
};