title: FormData boolean field?
body: <p>I need to use booleans within form data. For example:</p>
  
  <pre><code>let example = new FormData();
  example.append('aBoolean', true);
  </code></pre>
  
  <p>This throws and error as the above 'true' needs to be in string form. Do you know a way I can use booleans within FormData? Alternatively even a way to cast it as a boolean when I get the value by:</p>
  
  <pre><code>example.get("aBoolean")
  </code></pre>
  
  <p>Assuming i did store the true as a string in the above example.</p>