title: Add/Create Element to ObjectStorage using Javascript in Extbase/Fluid TYPO3
body: <p>what is the correct way to dynamically create new Child Elements in a Fluid Form using JavaScript?</p>
  
  <p><strong>Problem:</strong>
  1:n Relation (Parent/Child) using Extbase ObjectStorages:
  When the Parent Fluid Form is called it should be possible to add several childs (incl. properties of course!)</p>
  
  <p><strong>Dirty, partly working, Solution:</strong>
  I added some JS Code and added the required input elements dynamically.
  The "xxx" will be interated for each Child. The data will be correctly stored in the DB.</p>
  
  <pre><code>&lt;input type="text" placeholder="First Name" name="tx_booking[newBooking][accompanyingperson][xxx][firstname]"&gt;
  </code></pre>
  
  <p>However, if an error occurres all child forms disappear and no f3-form-error will be shown. The reason for this, may be the redirect to originalRequest (initial form without child fields).</p>
  
  <p>How can I handle this Problem without dirty tricks?
  Please give me shirt hint.</p>