title: Adding on-click functionality to a Leaflet point
body: <p>Using the following code to add json points to a map using Leaflet.</p>
  
  <pre><code>var geojsonLayer = new L.GeoJSON(data, {
      pointToLayer: function (latlng){
          return new L.CircleMarker(latlng, {
              radius: 8,
                 fillColor: "#fecb00",
                 color: "#fecb00",
                 weight: 1,
                 opacity: 1,
                 fillOpacity: 0.9,
             });
  
         }
  
  });
  </code></pre>
  
  <p>I want to add functionality so that clicking the point brings up a popup with more information from the geojson file. How is this accomplished?</p>