inject js to ios that put catch

gistfile1.txt

document.querySelector('#printLink').addEventListener('click', function() {
  var iframe = document.querySelector('.printLink-iframe');
  if (!iframe) {
    iframe = document.createElement('div');
    iframe.style.display = 'none';
    iframe.classList.add('printLink-iframe');
  }

  iframe.innerHTML = '<iframe src="/printLink-iframe"></iframe>';
  document.body.appendChild(iframe);
});