el.xwx.moe/components/ToggleDarkMode.tsx

import useLocalSettingsStore from "@/store/localSettings";
import { useEffect, useState } from "react";

type Props = {
  className?: string;
};

export default function ToggleDarkMode({ className }: Props) {
  const { updateSettings } = useLocalSettingsStore();

  const [theme, setTheme] = useState(localStorage.getItem("theme"));

  const handleToggle = (e: any) => {
    if (e.target.checked) {
      setTheme("dark");
    } else {
      setTheme("light");
    }
  };

  useEffect(() => {
    updateSettings({ theme: theme as string });
  }, [theme]);

  return (
    <label className="swap swap-rotate className">
      <input
        type="checkbox"
        onChange={handleToggle}
        className="theme-controller"
        checked={localStorage.getItem("theme") === "light" ? false : true}
      />

      {/* sun icon */}
      <svg
        className="swap-on fill-current w-10 h-10"
        xmlns="http://www.w3.org/2000/svg"
        viewBox="0 0 24 24"
      >
        <path d="M5.64,17l-.71.71a1,1,0,0,0,0,1.41,1,1,0,0,0,1.41,0l.71-.71A1,1,0,0,0,5.64,17ZM5,12a1,1,0,0,0-1-1H3a1,1,0,0,0,0,2H4A1,1,0,0,0,5,12Zm7-7a1,1,0,0,0,1-1V3a1,1,0,0,0-2,0V4A1,1,0,0,0,12,5ZM5.64,7.05a1,1,0,0,0,.7.29,1,1,0,0,0,.71-.29,1,1,0,0,0,0-1.41l-.71-.71A1,1,0,0,0,4.93,6.34Zm12,.29a1,1,0,0,0,.7-.29l.71-.71a1,1,0,1,0-1.41-1.41L17,5.64a1,1,0,0,0,0,1.41A1,1,0,0,0,17.66,7.34ZM21,11H20a1,1,0,0,0,0,2h1a1,1,0,0,0,0-2Zm-9,8a1,1,0,0,0-1,1v1a1,1,0,0,0,2,0V20A1,1,0,0,0,12,19ZM18.36,17A1,1,0,0,0,17,18.36l.71.71a1,1,0,0,0,1.41,0,1,1,0,0,0,0-1.41ZM12,6.5A5.5,5.5,0,1,0,17.5,12,5.51,5.51,0,0,0,12,6.5Zm0,9A3.5,3.5,0,1,1,15.5,12,3.5,3.5,0,0,1,12,15.5Z" />
      </svg>

      {/* moon icon */}
      <svg
        className="swap-off fill-current w-10 h-10"
        xmlns="http://www.w3.org/2000/svg"
        viewBox="0 0 24 24"
      >
        <path d="M21.64,13a1,1,0,0,0-1.05-.14,8.05,8.05,0,0,1-3.37.73A8.15,8.15,0,0,1,9.08,5.49a8.59,8.59,0,0,1,.25-2A1,1,0,0,0,8,2.36,10.14,10.14,0,1,0,22,14.05,1,1,0,0,0,21.64,13Zm-9.5,6.69A8.14,8.14,0,0,1,7.08,5.22v.27A10.15,10.15,0,0,0,17.22,15.63a9.79,9.79,0,0,0,2.1-.22A8.11,8.11,0,0,1,12.14,19.73Z" />
      </svg>
    </label>
  );
}