This example creates a rectangle based on the viewport on any 'zoom-changed' event.
Read the documentation.
// This example creates a rectangle based on the viewport
// on any 'zoom-changed' event.
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 11,
center: {lat: 40.748520, lng: -73.981687},
mapTypeId: 'terrain'
});
var rectangle = new google.maps.Rectangle();
map.addListener('zoom_changed', function() {
// Get the current bounds, which reflect the bounds before the zoom.
rectangle.setOptions({
strokeColor: '#FF0000',
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: '#FF0000',
fillOpacity: 0.35,
map: map,
bounds: map.getBounds()
});
});
}
<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>Rectangle Zoom</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>
// This example creates a rectangle based on the viewport
// on any 'zoom-changed' event.
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 11,
center: {lat: 40.748520, lng: -73.981687},
mapTypeId: 'terrain'
});
var rectangle = new google.maps.Rectangle();
map.addListener('zoom_changed', function() {
// Get the current bounds, which reflect the bounds before the zoom.
rectangle.setOptions({
strokeColor: '#FF0000',
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: '#FF0000',
fillOpacity: 0.35,
map: map,
bounds: map.getBounds()
});
});
}
</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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