(function () {
  var statusEl = document.getElementById("status");
  var metaEl = document.getElementById("meta");
  var btn = document.getElementById("action");

  if (!statusEl || !metaEl || !btn) {
    throw new Error("Missing required DOM elements.");
  }

  var now = new Date();
  statusEl.textContent = "Status: JavaScript loaded.";
  metaEl.textContent = "Loaded at " + now.toISOString();

  btn.addEventListener("click", function () {
    var clicks = Number(btn.getAttribute("data-clicks") || "0") + 1;
    btn.setAttribute("data-clicks", String(clicks));
    btn.textContent = "Clicked " + clicks + (clicks === 1 ? " time" : " times");
  });
})();