title: Export leaflet map to geojson
body: <p>Is it possible to export geojson from leaflet to save the map state? </p>
  
  <p>I want to store the markers, zoom &amp; map center to load it later.</p>
  
  <p>There is plenty of ways to load geojson on leaflet, but I can't figure out any option to export the map to geojson...</p>