(function () {
  if (typeof QRCode === "undefined") return;

  var nodes = document.querySelectorAll("[data-qr]");
  Array.prototype.forEach.call(nodes, function (el) {
    var text = (el.getAttribute("data-qr") || "").trim();
    if (!text) return;
    el.innerHTML = "";
    try {
      new QRCode(el, {
        text: text,
        width: 96,
        height: 96,
        colorDark: "#000000",
        colorLight: "#ffffff",
        correctLevel: QRCode.CorrectLevel.M,
      });
    } catch (err) {
      // ignore render errors; keep empty box
    }
  });
})();