Automatically initiate a file download in the user's browser

Clientside-File-Download.js

const generateDownload = report => {
  var downloadLink = document.createElement('a');
  downloadLink.style = 'display: none';
  document.body.appendChild(downloadLink);

  var blob = new Blob([report.data], {
    type: 'application/octet-stream',
  });

  var url = window.URL.createObjectURL(blob);

  downloadLink.href = url;
  downloadLink.download = report.filename;
  downloadLink.click();

  window.URL.revokeObjectURL(url);
  document.body.removeChild(downloadLink);
};

This was used to allow user to select rows in a grid and generate an Excel report from them in the browser.