title: How to pass 'filename' parameter to FormData.append() method for string data
body: <p>In my <code>FormData.append</code> <a href="https://developer.mozilla.org/en-US/docs/Web/API/FormData#append%28%29" rel="nofollow">method</a> I have some job settings that I send as part of multipart/form-data <code>POST</code>. The problem is: my case is the third one, as specified in the link above, that is - I pass my data as a string (and not as <code>file</code> or <code>blob</code>), and therefore, I cannot specify the third, optional parameter <code>filename</code>.</p>
  
  <p>Is there a workaround of how I could specify that additional parameter for the string data.</p>