Make polygons clickable

async function init() {
    const { Map3DElement, Polygon3DInteractiveElement } =
        await google.maps.importLibrary('maps3d');

    const map = new Map3DElement({
        center: { lat: 40.6842, lng: -74.0019, altitude: 1000 },
        heading: 340,
        tilt: 70,
        mode: 'HYBRID',
    });

    document.body.append(map);

    const polygonOptions = {
        strokeColor: '#0000ff80',
        strokeWidth: 8,
        fillColor: '#ff000080',
        drawsOccludedSegments: false,
    };

    const examplePolygon = new Polygon3DInteractiveElement(polygonOptions);

    examplePolygon.path = [
        { 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', function (event) {
        // change the color of the polygon stroke and fill colors to a random alternatives!
        this.fillColor = randomizeHexColor(this.fillColor);
        this.strokeColor = randomizeHexColor(this.strokeColor);
        console.log(event);
    });

    map.append(examplePolygon);
}

function randomizeHexColor(originalHexColor) {
    console.log(originalHexColor);
    const 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}`;
}

void 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>
        <script>
            // prettier-ignore
            (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: "GOOGLE_MAPS_API_KEY"
            });
        </script>
    </head>
    <body>
        <div id="map"></div>
    </body>
</html>
index.html