alert弹窗去掉上方网址标题

window.alert = function (name) {
  const iframe = document.createElement('IFRAME');
  iframe.style.display = 'none';
  iframe.setAttribute('src', 'data:text/plain,');
  document.documentElement.appendChild(iframe);
  window.frames[0].window.alert(name);
  iframe.parentNode.removeChild(iframe);
};

ok