JavaScript 建立和儲存檔案

function downloadFiles(data, file_name, file_type) {
  var file = new Blob([data], {type: file_type});
  if (window.navigator.msSaveOrOpenBlob)
    window.navigator.msSaveOrOpenBlob(file, file_name);
  else {
    var a = document.createElement('a'), url = URL.createObjectURL(file);
    a.href = url;
    a.download = file_name;
    document.body.appendChild(a);
    a.click();
    setTimeout(function() {
      document.body.removeChild(a);
      window.URL.revokeObjectURL(url);
    }, 0);
  }
}