title: Query of coordinate data in Folium (ClickForMarker)
body: <p>everyone,
  I am currently creating a small project with python / django.</p>
  <p>I would like to develop a tool in which the user can mark a point on a map - and then send it off using the &quot;Remember address&quot; button. This data should then be stored in the database.</p>
  <p>I use Folium / Leaflet for this. With the function &quot;ClickForMarker&quot; I can already mark points on the map.</p>
  <p>Now to my question :)</p>
  <ul>
  <li>Currently, a new marker is placed with each click - however, I would like that if a user clicks several times, the marker is always updated.</li>
  <li>How can I read out the data (coordinates). Or do I have a &quot;Send data&quot; button below the map - can I process the post request with the data?</li>
  </ul>
  <p>I don't think I have to mention that I'm still a beginner - with Javascript, for example, I only know very little.</p>
  <p>I'm happy about any help :)</p>