[javascript] Google Maps JS API v3 - Simple Multiple Marker Example

Following from Daniel Vassallo's answer, here is a version that deals with the closure issue in a simpler way.

Since since all markers will have an individual InfoWindow and since JavaScript doesn't care if you add extra properties to an object, all you need to do is add an InfoWindow to the Marker's properties and then call the .open() on the InfoWindow from itself!

Edit: With enough data, the pageload could take a lot of time, so rather than construction the InfoWindow with the marker, the construction should happen only when needed. Note that any data used to construct the InfoWindow must be appended to the Marker as a property (data). Also note that after the first click event, infoWindow will persist as a property of it's marker so the browser doesn't need to constantly reconstruct.

var locations = [
  ['Bondi Beach', -33.890542, 151.274856, 4],
  ['Coogee Beach', -33.923036, 151.259052, 5],
  ['Cronulla Beach', -34.028249, 151.157507, 3],
  ['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
  ['Maroubra Beach', -33.950198, 151.259302, 1]
];

var map = new google.maps.Map(document.getElementById('map'), {
  center: new google.maps.LatLng(-33.92, 151.25)
});

for (i = 0; i < locations.length; i++) {  
  marker = new google.maps.Marker({
    position: new google.maps.LatLng(locations[i][1], locations[i][2]),
    map: map,
    data: {
      name: locations[i][0]
    }
  });
  marker.addListener('click', function() {
    if(!this.infoWindow) {
      this.infoWindow = new google.maps.InfoWindow({
        content: this.data.name;
      });
    }
    this.infoWindow.open(map,this);
  })
}

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