Maps JavaScript API Demo

by asthmaticcanary

HTML

<!doctype html>
<html>
  <head>
    <title>Add Map</title>
  </head>
  <body>
    <h3>My Google Maps Demo</h3>
    <!-- Button to demonstrate hiding markers -->
    <p>Use this button to hide some markers as an example.</p>
    <button>
    Hide half of markers
    </button>
    <!--The div element for the map -->
    <div id="map"></div>
    

    <!-- Include maps, marker clusterer -->
    <script src="https://unpkg.com/@googlemaps/markerclusterer/dist/index.min.js"></script>
    <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: "YOUR_API_KEY", v: "weekly"});</script>
  </body>
</html>

CSS

#map {
  height: 100%;
}
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}
button {
  margin: 1rem;
  padding: 1rem;
  cursor: pointer;
}

JavaScript

const locations = [
  { lat: -31.56391, lng: 147.154312 },
  { lat: -33.718234, lng: 150.363181 },
  { lat: -33.727111, lng: 150.371124 },
  { lat: -33.848588, lng: 151.209834 },
  { lat: -33.851702, lng: 151.216968 },
  { lat: -34.671264, lng: 150.863657 },
  { lat: -35.304724, lng: 148.662905 },
  { lat: -36.817685, lng: 175.699196 },
  { lat: -36.828611, lng: 175.790222 },
  { lat: -37.75, lng: 145.116667 },
  { lat: -37.759859, lng: 145.128708 },
  { lat: -37.765015, lng: 145.133858 },
  { lat: -37.770104, lng: 145.143299 },
  { lat: -37.7737, lng: 145.145187 },
  { lat: -37.774785, lng: 145.137978 },
  { lat: -37.819616, lng: 144.968119 },
  { lat: -38.330766, lng: 144.695692 },
  { lat: -39.927193, lng: 175.053218 },
  { lat: -41.330162, lng: 174.865694 },
  { lat: -42.734358, lng: 147.439506 },
  { lat: -42.734358, lng: 147.501315 },
  { lat: -42.735258, lng: 147.438 },
  { lat: -43.999792, lng: 170.463352 },
];

// Initialize and add the map
let map;
let markers = [];

async function initMap() {
  // The location of Uluru
  const position = { lat: -25.344, lng: 131.031 };

  const { Map } = await google.maps.importLibrary("maps");
  const { AdvancedMarkerElement } = await google.maps.importLibrary("marker");

  // The map, centered at Uluru
  map = new Map(document.getElementById("map"), {
    zoom: 4,
    center: position,
    mapId: "DEMO_MAP_ID",
  });

  for (let i = 0; i < locations.length; i++) {
  
    const pinGlyph = new google.maps.marker.PinElement({
      glyphColor: "white",
    });
    
    const marker = new google.maps.marker.AdvancedMarkerElement({
      map,
      position: locations[i],
      title: "demo",
      content: pinGlyph.element,
    });
    
    markers.push(marker);

  }
  
  const markerCluster = new markerClusterer.MarkerClusterer({ markers, map });
}

initMap();

const button = document.querySelector("button");

button.addEventListener("click", (event) => {
  for (let j = 0; j < markers.length / 2; j++) {
   ...