download blob file and excel file

const blob = new Blob([response], { type: 'application/octet-stream'});
const linkElt = document.createElement('a');
linkElt.setAttribute('href', window.URL.createObjectURL(blob));
linkElt.setAttribute('download', `${sessionStorage.getItem('productCode')}_${sessionStorage.getItem('productVersion')}_${this.hasCoverage.length > 0 ? this.hasCoverage[0].code : 'insured'}.xlsx`);
const event = document.createEvent('MouseEvents');event.initMouseEvent('click', true, true, document.defaultView, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
linkElt.dispatchEvent(event);

excel

const aLink = document.createElement('a');
const blob = new Blob(
  ['\uFEFF' + response],
  { type: 'data:text/csv;charset=utf-8'}
);
const evt = document.createEvent('MouseEvents');
evt.initEvent('click', true, true);
aLink.download = 'acccess_detail_report_' + format(new Date().getTime(), 'MMdd') + '.csv';
aLink.href = URL.createObjectURL(blob);
aLink.dispatchEvent(evt);