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Draggable Polygons

This example creates draggable triangles on the map. Note also that the red triangle is geodesic, so its shape changes as you drag it north or south.

Read the documentation.

TypeScript

// This example creates draggable triangles on the map.
// Note also that the red triangle is geodesic, so its shape changes
// as you drag it north or south.

function initMap(): void {
  const map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    {
      zoom: 1,
      center: { lat: 24.886, lng: -70.268 },
      mapTypeId: "terrain",
    }
  );

  const blueCoords = [
    { lat: 25.774, lng: -60.19 },
    { lat: 18.466, lng: -46.118 },
    { lat: 32.321, lng: -44.757 },
  ];

  const redCoords = [
    { lat: 25.774, lng: -80.19 },
    { lat: 18.466, lng: -66.118 },
    { lat: 32.321, lng: -64.757 },
  ];

  // Construct a draggable red triangle with geodesic set to true.
  new google.maps.Polygon({
    map,
    paths: redCoords,
    strokeColor: "#FF0000",
    strokeOpacity: 0.8,
    strokeWeight: 2,
    fillColor: "#FF0000",
    fillOpacity: 0.35,
    draggable: true,
    geodesic: true,
  });

  // Construct a draggable blue triangle with geodesic set to false.
  new google.maps.Polygon({
    map,
    paths: blueCoords,
    strokeColor: "#0000FF",
    strokeOpacity: 0.8,
    strokeWeight: 2,
    fillColor: "#0000FF",
    fillOpacity: 0.35,
    draggable: true,
    geodesic: false,
  });
}

JavaScript

// This example creates draggable triangles on the map.
// Note also that the red triangle is geodesic, so its shape changes
// as you drag it north or south.
function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    zoom: 1,
    center: { lat: 24.886, lng: -70.268 },
    mapTypeId: "terrain",
  });
  const blueCoords = [
    { lat: 25.774, lng: -60.19 },
    { lat: 18.466, lng: -46.118 },
    { lat: 32.321, lng: -44.757 },
  ];
  const redCoords = [
    { lat: 25.774, lng: -80.19 },
    { lat: 18.466, lng: -66.118 },
    { lat: 32.321, lng: -64.757 },
  ];
  // Construct a draggable red triangle with geodesic set to true.
  new google.maps.Polygon({
    map,
    paths: redCoords,
    strokeColor: "#FF0000",
    strokeOpacity: 0.8,
    strokeWeight: 2,
    fillColor: "#FF0000",
    fillOpacity: 0.35,
    draggable: true,
    geodesic: true,
  });
  // Construct a draggable blue triangle with geodesic set to false.
  new google.maps.Polygon({
    map,
    paths: blueCoords,
    strokeColor: "#0000FF",
    strokeOpacity: 0.8,
    strokeWeight: 2,
    fillColor: "#0000FF",
    fillOpacity: 0.35,
    draggable: true,
    geodesic: false,
  });
}

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;
}

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>Draggable Polygons</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>Draggable Polygons</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 draggable triangles on the map.
      // Note also that the red triangle is geodesic, so its shape changes
      // as you drag it north or south.
      function initMap() {
        const map = new google.maps.Map(document.getElementById("map"), {
          zoom: 1,
          center: {
            lat: 24.886,
            lng: -70.268,
          },
          mapTypeId: "terrain",
        });
        const blueCoords = [
          {
            lat: 25.774,
            lng: -60.19,
          },
          {
            lat: 18.466,
            lng: -46.118,
          },
          {
            lat: 32.321,
            lng: -44.757,
          },
        ];
        const redCoords = [
          {
            lat: 25.774,
            lng: -80.19,
          },
          {
            lat: 18.466,
            lng: -66.118,
          },
          {
            lat: 32.321,
            lng: -64.757,
          },
        ]; // Construct a draggable red triangle with geodesic set to true.

        new google.maps.Polygon({
          map,
          paths: redCoords,
          strokeColor: "#FF0000",
          strokeOpacity: 0.8,
          strokeWeight: 2,
          fillColor: "#FF0000",
          fillOpacity: 0.35,
          draggable: true,
          geodesic: true,
        }); // Construct a draggable blue triangle with geodesic set to false.

        new google.maps.Polygon({
          map,
          paths: blueCoords,
          strokeColor: "#0000FF",
          strokeOpacity: 0.8,
          strokeWeight: 2,
          fillColor: "#0000FF",
          fillOpacity: 0.35,
          draggable: true,
          geodesic: false,
        });
      }
    </script>
  </head>
  <body>
    <div id="map"></div>
  </body>
</html>
"use strict"; // This example creates draggable triangles on the map. // Note also that the red triangle is geodesic, so its shape changes // as you drag it north or south. function initMap() { const map = new google.maps.Map(document.getElementById("map"), { zoom: 1, center: { lat: 24.886, lng: -70.268, }, mapTypeId: "terrain", }); const blueCoords = [ { lat: 25.774, lng: -60.19, }, { lat: 18.466, lng: -46.118, }, { lat: 32.321, lng: -44.757, }, ]; const redCoords = [ { lat: 25.774, lng: -80.19, }, { lat: 18.466, lng: -66.118, }, { lat: 32.321, lng: -64.757, }, ]; // Construct a draggable red triangle with geodesic set to true. new google.maps.Polygon({ map, paths: redCoords, strokeColor: "#FF0000", strokeOpacity: 0.8, strokeWeight: 2, fillColor: "#FF0000", fillOpacity: 0.35, draggable: true, geodesic: true, }); // Construct a draggable blue triangle with geodesic set to false. new google.maps.Polygon({ map, paths: blueCoords, strokeColor: "#0000FF", strokeOpacity: 0.8, strokeWeight: 2, fillColor: "#0000FF", fillOpacity: 0.35, draggable: true, geodesic: false, }); }
/* 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>Draggable Polygons</title> <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script> <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBIwzALxUPNbatRBj3Xi1Uhp0fFzwWNBkE&callback=initMap&libraries=&v=weekly" defer ></script> <!-- jsFiddle will insert css and js --> </head> <body> <div id="map"></div> </body> </html>

Create a starter application from sample

A skeleton starter application using TypeScript, Webpack, and Babel can be generated from this sample using one of the methods below.

Run Locally

Node.js is required to run this sample locally. Follow these instructions to install Node.js and NPM.

npm i -g '@googlemaps/js-samples'
googlemaps-js-samples init polygon-draggable DESTINATION_FOLDER

Run in Google Cloud Shell

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Run in Cloud Shell