title: Javascript events are not working in marker of an map in ionic
body: <p>I am working on an ionic project in which i am using 3d map.
  In this project I have created an marker on the map, on this marker I want to have the click event. following is my code</p>
  
  <pre><code>//import Wrld from 'wrld.js';
  import * as eeGeo from '../../assets/js/eegeo';
  import 'rxjs/add/operator/map';
  
  
  ionViewDidLoad() {
      this.map = eeGeo.map("map", "57c2476b17a6a45fa03e4b8d042235d1", {
        center: [37.7858, -122.401],
        zoom: 16,
        indoorsEnabled: true,
        displayEntranceMarkers: true
      });
    }
  
    selectitem(item)
         {
           this.searchbar = false;
           this.cardhaed = item.title;
           this.floor = item.floor
           console.log(this.floor);
  
           this.lat = item.latitude;
           this.lng = item.longitude;
           this.addmarker(item);
    }
    addmarker(item)
    {
  
        this.marker  = eeGeo.marker([this.lat, this.lng], {
          title: item.title,
          indoorsEnabled: true,      
          indoorMapId: item.indoorid,
          displayEntranceMarkers: false,
          indoorMapFloorId: item.id
        }).addTo(this.map);
  
       this.marker.on('click', function(e) {
         alert(e.latlng);
    });
  </code></pre>
  
  <p>But in this the on event is not working.
  Any help ???</p>