"use client";

import { useEffect } from "react";

export default function RegisterServiceWorker() {
  useEffect(() => {
    // sw.js precaches /404.html, which only exists as a static file after
    // `next build`'s static export — under `next dev` it 404s and fails the
    // whole cache.addAll(), so only register outside of development.
    if (process.env.NODE_ENV !== "production") return;
    if (!("serviceWorker" in navigator)) return;
    navigator.serviceWorker.register("/sw.js").catch((err) => {
      console.error("Service worker registration failed:", err);
    });
  }, []);

  return null;
}