title: How can I handle nested forms in react-final-form?
body: <p>I intend to make certain fields editable via a "popup" portal, where the popup itself is managed by a form. When you "submit" the nested form, the field updates. - <a href="https://github.com/final-form/react-final-form/issues/276" rel="nofollow noreferrer">https://github.com/final-form/react-final-form/issues/276</a></p>
  
  <p>The issue I'm getting into is that the onSubmitCustom (inner form) triggers for both the onSubmit for the inner form and the onSubmit for the outer form.</p>
  
  <p>How can I get nested forms to work in react-final-form?</p>
  
  <p>As a workaround, if I had a way to capture the form id that actually submitted the form, I could return false on the outer form's onSubmit when the onSubmitCustom (inner form) is triggered. But I have yet to figure out how to do that.</p>