Opening multiple popups for a featureGroup in Leaflet

by Alex Azuero

HTML

<script src="http://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.js"></script>
<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.css">
<div id="map"></div>

CSS

html,
body,
#map {
  height: 100%;
  width: 100%;
  padding: 0px;
  margin: 0px;
}

JavaScript

/////////////////////////////////////////////////////////////////////////////////////////////
//hack to allow opening of multiple popups//
/////////////////////////////////////////////////////////////////////////////////////////////
L.Map = L.Map.extend({
    openPopup: function(popup) {
        this._popup = popup;
        return this.addLayer(popup).fire('popupopen', {
            popup: this._popup
        });
    }
});

/////////////////////////////////////////////////////////////////////////////////////////////
//setting up the map//
/////////////////////////////////////////////////////////////////////////////////////////////
var map = L.map('map').setView([33.3,33.8], 8);
ATTR = '&copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, ' +
  '<a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a> | ' +
  '&copy; <a href="http://cartodb.com/attributions">CartoDB</a>';
CDB_URL = 'http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png';
L.tileLayer(CDB_URL, {
  attribution: ATTR
}).addTo(map);

/////////////////////////////////////////////////////////////////////////////////////////////
//adding data//
/////////////////////////////////////////////////////////////////////////////////////////////
var testMarker = L.marker([32.9076,33.35449]).bindPopup('Marker 1');
var testMarkerTwo = L.marker([33.58259,34.64539]).bindPopup('Marker 2');
var markerGroup = L.featureGroup([testMarker,testMarkerTwo]).addTo(map);
markerGroup.eachLayer(function(layer) {
  layer.openPopup();
});