How to Display Multiple Markers with InfoWindows using the Google Maps JS API v3?

Google Maps JS API v3 - Simple Multiple Marker Example

Creating a Map and Markers

To begin, create a new HTML file and include the Google Maps API script with your API key. Next, set up the Map object and provide it with the necessary parameters:

var map = new google.maps.Map(document.getElementById('map'), {
  zoom: 10,
  center: new google.maps.LatLng(-33.92, 151.25),
  mapTypeId: google.maps.MapTypeId.ROADMAP
});

Creating an InfoWindow

Define an InfoWindow object, which displays the location name upon marker click:

var infowindow = new google.maps.InfoWindow();

Looping Through Location Data

Next, iterate through your data array and create a marker for each location, adding it to the map:

for (i = 0; i <p><strong>Setting Click Events for InfoWindows</strong></p><p>Finally, add an event listener to each marker that triggers the InfoWindow to open when clicked:</p><pre class="brush:php;toolbar:false">  google.maps.event.addListener(marker, 'click', (function(marker, i) {
    return function() {
      infowindow.setContent(locations[i][0]);
      infowindow.open(map, marker);
    }
  })(marker, i));
}

Complete Code

The complete code looks like this:

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'), {
  zoom: 10,
  center: new google.maps.LatLng(-33.92, 151.25),
  mapTypeId: google.maps.MapTypeId.ROADMAP
});

var infowindow = new google.maps.InfoWindow();

var marker, i;

for (i = 0; i 

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