Download files with AJAX (axios)

download-file.js

axios({
  url: 'http://localhost:5000/static/example.pdf',
  method: 'GET',
  responseType: 'blob', // important
}).then((response) => {
  const url = window.URL.createObjectURL(new Blob([response.data]));
  const link = document.createElement('a');
  link.href = url;
  link.setAttribute('download', 'file.pdf');
  link.click();
  window.URL.revokeObjectURL(url);
});

To reuse the file name from content-disposition header:

    link.setAttribute('download', response.headers["content-disposition"].split("filename=")[1])

Don't forget about adding content-disposition to Access-Control-Expose-Headers when CORS rules apply.