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Rectangle Zoom

This example creates a rectangle based on the viewport on any zoom-changed event.

Read the documentation.

TypeScript

// This example creates a rectangle based on the viewport
// on any 'zoom-changed' event.

function initMap(): void {
  const map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    {
      zoom: 11,
      center: { lat: 40.74852, lng: -73.981687 },
      mapTypeId: "terrain"
    }
  );

  const rectangle = new google.maps.Rectangle();

  map.addListener("zoom_changed", () => {
    // 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,
      bounds: map.getBounds() as google.maps.LatLngBounds
    });
  });
}

JavaScript

// This example creates a rectangle based on the viewport
// on any 'zoom-changed' event.
function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    zoom: 11,
    center: { lat: 40.74852, lng: -73.981687 },
    mapTypeId: "terrain"
  });
  const rectangle = new google.maps.Rectangle();
  map.addListener("zoom_changed", () => {
    // 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,
      bounds: map.getBounds()
    });
  });
}

CSS


      

      

        
HTML

        
<!DOCTYPE html>
<html>
  <head>
    <title>Rectangle Zoom</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
      defer
    ></script>
    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script src="./app.js"></script>
  </head>
  <body>
    <div id="map"></div>
  </body>
</html>

      

      

        
All

        
<!DOCTYPE html>
<html>
  <head>
    <title>Rectangle Zoom</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
      defer
    ></script>
    <style type="text/css">
      /* 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>
    <script>
      "use strict";

      // This example creates a rectangle based on the viewport
      // on any 'zoom-changed' event.
      function initMap() {
        const map = new google.maps.Map(document.getElementById("map"), {
          zoom: 11,
          center: {
            lat: 40.74852,
            lng: -73.981687
          },
          mapTypeId: "terrain"
        });
        const rectangle = new google.maps.Rectangle();
        map.addListener("zoom_changed", () => {
          // 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,
            bounds: map.getBounds()
          });
        });
      }
    </script>
  </head>
  <body>
    <div id="map"></div>
  </body>
</html>

      

    

    
    
    
"use strict";

// This example creates a rectangle based on the viewport
// on any 'zoom-changed' event.
function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    zoom: 11,
    center: {
      lat: 40.74852,
      lng: -73.981687
    },
    mapTypeId: "terrain"
  });
  const rectangle = new google.maps.Rectangle();
  map.addListener("zoom_changed", () => {
    // 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,
      bounds: map.getBounds()
    });
  });
}

    
/* 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;
}

    
<!DOCTYPE html>
<html>
  <head>
    <title>Rectangle Zoom</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <script
      src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCb1xprYSpXd0q_yDsJ1W2UGhfl9_YGKU0&callback=initMap&libraries=&v=weekly"
      defer
    ></script>
    <!-- jsFiddle will insert css and js -->
  </head>
  <body>
    <div id="map"></div>
  </body>
</html>