title: Why is FormData empty?
body: <p>I have followed <a href="https://developer.mozilla.org/en-US/docs/Web/API/FormData/Using_FormData_Objects" rel="noreferrer">this guide on MDN</a>.</p>
  
  <pre><code>var formData = new FormData();    
  formData.append("username", "Groucho");
  formData.append("accountnum", 123456);
  console.log(formData);
  </code></pre>
  
  <p>Why is <code>formData</code> empty?</p>