Make polygons clickable

The following example shows how to handle click events on polygons in Photorealistic 3D Maps in Maps JavaScript.

Read the documentation.

JavaScriptCSSHTML
async function init() {
    const { Map3DElement, MapMode, Polygon3DInteractiveElement } = await google.maps.importLibrary("maps3d");
    const map = new Map3DElement({
        center: { lat: 40.6842, lng: -74.0019, altitude: 1000 },
        heading: 340,
        tilt: 70,
        mode: MapMode.HYBRID,
    });
    document.body.append(map);
    const polygonOptions = {
        strokeColor: "#0000ff80",
        strokeWidth: 8,
        fillColor: "#ff000080",
        drawsOccludedSegments: false,
    };
    const examplePolygon = new google.maps.maps3d.Polygon3DInteractiveElement(polygonOptions);
    examplePolygon.outerCoordinates = [
        { lat: 40.7144, lng: -74.0208 },
        { lat: 40.6993, lng: -74.019 },
        { lat: 40.7035, lng: -74.0004 },
        { lat: 40.7144, lng: -74.0208 }
    ];
    examplePolygon.addEventListener('gmp-click', (event) => {
        // change the color of the polygon stroke and fill colors to a random alternatives!
        event.target.fillColor = randomizeHexColor(event.target.fillColor);
        event.target.strokeColor = randomizeHexColor(event.target.fillColor);
        console.log(event);
    });
    map.append(examplePolygon);
}
function randomizeHexColor(originalHexColor) {
    console.log(originalHexColor);
    let alpha = '';
    alpha = originalHexColor.substring(7);
    // Generate random values for Red, Green, Blue (0-255)
    const r = Math.floor(Math.random() * 256);
    const g = Math.floor(Math.random() * 256);
    const b = Math.floor(Math.random() * 256);
    console.log(r + " " + g + " " + b);
    // Convert decimal to 2-digit hex, padding with '0' if needed
    const rHex = ('0' + r.toString(16)).slice(-2);
    const gHex = ('0' + g.toString(16)).slice(-2);
    const bHex = ('0' + b.toString(16)).slice(-2);
    // Combine parts: '#' + random RGB + original Alpha (if any)
    return `#${rHex}${gHex}${bHex}${alpha}`;
}
init();
index.js
 
/* * Always set the map height explicitly to define the size of the div element
 * that contains the map. 
 */
html,
map {
  height: 100%;
}
body {
  height: 100%;
  margin: 0;
  padding: 0;
}
style.css
 
<html>
  <head>
    <title>Map</title>

    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script type="module" src="./index.js"></script>
  </head>
  <body>
    <div id="map"></div>

    <!-- prettier-ignore -->
    <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
        ({key: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "beta",});</script>
  </body>
</html>
index.html

Try Sample

Clone Sample

Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application. 

  git clone https://github.com/googlemaps-samples/js-api-samples.git
  cd samples/3d-polygon-click-event
  npm i
  npm start