This example creates a map with tappable markers displaying a secret message.
Read the documentation.
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 4,
center: {lat: -25.363882, lng: 131.044922 }
});
var bounds = {
north: -25.363882,
south: -31.203405,
east: 131.044922,
west: 125.244141
};
// Display the area between the location southWest and northEast.
map.fitBounds(bounds);
// Add 5 markers to map at random locations.
// For each of these markers, give them a title with their index, and when
// they are clicked they should open an infowindow with text from a secret
// message.
var secretMessages = ['This', 'is', 'the', 'secret', 'message'];
var lngSpan = bounds.east - bounds.west;
var latSpan = bounds.north - bounds.south;
for (var i = 0; i < secretMessages.length; ++i) {
var marker = new google.maps.Marker({
position: {
lat: bounds.south + latSpan * Math.random(),
lng: bounds.west + lngSpan * Math.random()
},
map: map
});
attachSecretMessage(marker, secretMessages[i]);
}
}
// Attaches an info window to a marker with the provided message. When the
// marker is clicked, the info window will open with the secret message.
function attachSecretMessage(marker, secretMessage) {
var infowindow = new google.maps.InfoWindow({
content: secretMessage
});
marker.addListener('click', function() {
infowindow.open(marker.get('map'), marker);
});
}
<div id="map"></div>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
<!-- Replace the value of the key parameter with your own API key. --> <script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap"> </script>
Try it yourself
You can experiment with this code in JSFiddle by clicking the <> icon in the
top-right corner of the code window.
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Using Closures in Event Listeners</title>
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 4,
center: {lat: -25.363882, lng: 131.044922 }
});
var bounds = {
north: -25.363882,
south: -31.203405,
east: 131.044922,
west: 125.244141
};
// Display the area between the location southWest and northEast.
map.fitBounds(bounds);
// Add 5 markers to map at random locations.
// For each of these markers, give them a title with their index, and when
// they are clicked they should open an infowindow with text from a secret
// message.
var secretMessages = ['This', 'is', 'the', 'secret', 'message'];
var lngSpan = bounds.east - bounds.west;
var latSpan = bounds.north - bounds.south;
for (var i = 0; i < secretMessages.length; ++i) {
var marker = new google.maps.Marker({
position: {
lat: bounds.south + latSpan * Math.random(),
lng: bounds.west + lngSpan * Math.random()
},
map: map
});
attachSecretMessage(marker, secretMessages[i]);
}
}
// Attaches an info window to a marker with the provided message. When the
// marker is clicked, the info window will open with the secret message.
function attachSecretMessage(marker, secretMessage) {
var infowindow = new google.maps.InfoWindow({
content: secretMessage
});
marker.addListener('click', function() {
infowindow.open(marker.get('map'), marker);
});
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
</script>
</body>
</html>
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