import BMF from 'browser-md5-file';

const el = document.getElementById('upload');
const bmf = new BMF();

el.addEventListener('change', handle, false);

function handle(e) {
  const file = e.target.files[0];
  bmf.md5(
    file,
    (err, md5) => {
      console.log('err:', err);
      console.log('md5 string:', md5); // 97027eb624f85892c69c4bcec8ab0f11
    },
    progress => {
      console.log('progress number:', progress);
    },
  );
}

  bmf.abort();