function downloadData(data,fileName) {
  const url=window.URL.createObjectURL(data)
  const a = document.createElement('a');
  a.style.display = 'none';
  a.href = url;
  a.download = fileName;
  document.body.appendChild(a);
  a.click();
  window.URL.revokeObjectURL(url);
  document.body.removeChild(a)
}