2a06:98c0:3600::103

js
export default {
  async fetch(request, env, ctx) {
    const url = new URL(request.url);
    if (url.pathname === "/status") {
      let currentState = await env.MAINTENANCE_KV.get("maintenance");
      return new Response(`Maintenance mode ${currentState}`, { status: 200 });
    }

    let maintenanceMode = await env.MAINTENANCE_KV.get("maintenance");

    if (maintenanceMode === "on" || url.toString().includes("maintenance.example.com")) {
      const html = <"html of the page as a string">;
      return new Response(html, { status: 503, headers: {
        "content-type": "text/html;charset=UTF-8",
      }, });
    }
    return fetch(request);
  },
}