このページは Cloud Translation API によって翻訳されました。

HTML と CSS を使ったマーカーを作成する

「高度なマーカー」機能は、カスタム HTML および CSS を使った視覚的インパクトに優れるマーカーの作成に対応しており、インタラクティブ性やアニメーションを組み込むことも可能です。AdvancedMarkerElement のインスタンスはすべて HTML 要素として DOM に追加されているため、element プロパティを通してアクセス可能で、他の一般的な DOM 要素と同様に操作できます。AdvancedMarkerElement は DOM 要素なので、デフォルトのマーカーに CSS スタイルを直接適用することも、HTML と CSS を使ったカスタムマーカーをゼロから作成することも可能です。

単純な HTML マーカー

次の地図は、単純なカスタム HTML マーカーの例です。

ソースの確認

この例では、新しい div 要素を作成し、作成した div に CSS クラスおよびテキストコンテンツを割り当て、AdvancedMarkerElement に div を追加しています。

TypeScript

const mapElement = document.querySelector('gmp-map') as google.maps.MapElement;

async function initMap() {
    // Request needed libraries.
    const { Map } = (await google.maps.importLibrary(
        'maps'
    )) as google.maps.MapsLibrary;
    const { AdvancedMarkerElement } = (await google.maps.importLibrary(
        'marker'
    )) as google.maps.MarkerLibrary;

    const priceTag = document.createElement('div');
    priceTag.className = 'price-tag';
    priceTag.textContent = '$2.5M';

    const marker = new AdvancedMarkerElement({
        position: { lat: 37.42, lng: -122.1 },
    });
    marker.append(priceTag);
    mapElement.append(marker);
}
initMap();index.ts

JavaScript

const mapElement = document.querySelector('gmp-map');
async function initMap() {
    // Request needed libraries.
    const { Map } = (await google.maps.importLibrary('maps'));
    const { AdvancedMarkerElement } = (await google.maps.importLibrary('marker'));
    const priceTag = document.createElement('div');
    priceTag.className = 'price-tag';
    priceTag.textContent = '$2.5M';
    const marker = new AdvancedMarkerElement({
        position: { lat: 37.42, lng: -122.1 },
    });
    marker.append(priceTag);
    mapElement.append(marker);
}
initMap();index.js

CSS

/* 
 * Always set the map height explicitly to define the size of the div element
 * that contains the map. 
 */
gmp-map {
    height: 100%;
}

/* 
 * Optional: Makes the sample page fill the window. 
 */
html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}

/* HTML marker styles */
.price-tag {
    background-color: #4285f4;
    border-radius: 8px;
    color: #ffffff;
    font-size: 14px;
    padding: 10px 15px;
    position: relative;
    transform: translateY(-8px);
}

.price-tag::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 100%;
    transform: translate(-50%, 0);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid #4285f4;
}
style.css

HTML

<html>
    <head>
        <title>Advanced Marker Simple HTML</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.js"></script>
        <!-- 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: "weekly"});</script>
    </head>
    <body>
        <gmp-map
            center="37.42,-122.1"
            zoom="14"
            map-id="4504f8b37365c3d0"></gmp-map>
    </body>
</html>index.html

サンプルを試す

JSFiddle.net

インタラクティブなマーカー

この例では、クリック時に架空の情報を表示するインタラクティブなマーカー群を作成します。この例の機能のほとんどは CSS 内に含まれています。

ソースの確認

TypeScript

async function initMap() {
    // Request needed libraries.
    const { Map } = (await google.maps.importLibrary(
        'maps'
    )) as google.maps.MapsLibrary;
    const { AdvancedMarkerElement } = (await google.maps.importLibrary(
        'marker'
    )) as google.maps.MarkerLibrary;

    const center = { lat: 37.43238031167444, lng: -122.16795397128632 };
    const map = new Map(document.getElementById('map') as HTMLElement, {
        zoom: 11,
        center,
        mapId: '4504f8b37365c3d0',
    });

    for (const property of properties) {
        const advancedMarkerElement =
            new google.maps.marker.AdvancedMarkerElement({
                map,
                content: buildContent(property),
                position: property.position,
                title: property.description,
            });

        advancedMarkerElement.addListener('click', () => {
            toggleHighlight(advancedMarkerElement, property);
        });
    }
}

function toggleHighlight(markerView, property) {
    if (markerView.content.classList.contains('highlight')) {
        markerView.content.classList.remove('highlight');
        markerView.zIndex = null;
    } else {
        markerView.content.classList.add('highlight');
        markerView.zIndex = 1;
    }
}

function buildContent(property) {
    const content = document.createElement('div');
    content.classList.add('property');
    content.innerHTML = `
    <div class="icon">
        <i aria-hidden="true" class="fa fa-icon fa-${property.type}" title="${property.type}"></i>
        <span class="fa-sr-only">${property.type}</span>
    </div>
    <div class="details">
        <div class="price">${property.price}</div>
        <div class="address">${property.address}</div>
        <div class="features">
        <div>
            <i aria-hidden="true" class="fa fa-bed fa-lg bed" title="bedroom"></i>
            <span class="fa-sr-only">bedroom</span>
            <span>${property.bed}</span>
        </div>
        <div>
            <i aria-hidden="true" class="fa fa-bath fa-lg bath" title="bathroom"></i>
            <span class="fa-sr-only">bathroom</span>
            <span>${property.bath}</span>
        </div>
        <div>
            <i aria-hidden="true" class="fa fa-ruler fa-lg size" title="size"></i>
            <span class="fa-sr-only">size</span>
            <span>${property.size} ft<sup>2</sup></span>
        </div>
        </div>
    </div>
    `;
    return content;
}

const properties = [
    {
        address: '215 Emily St, MountainView, CA',
        description: 'Single family house with modern design',
        price: '$ 3,889,000',
        type: 'home',
        bed: 5,
        bath: 4.5,
        size: 300,
        position: {
            lat: 37.50024109655184,
            lng: -122.28528451834352,
        },
    },
    {
        address: '108 Squirrel Ln &#128063;, Menlo Park, CA',
        description: 'Townhouse with friendly neighbors',
        price: '$ 3,050,000',
        type: 'building',
        bed: 4,
        bath: 3,
        size: 200,
        position: {
            lat: 37.44440882321596,
            lng: -122.2160620727,
        },
    },
    {
        address: '100 Chris St, Portola Valley, CA',
        description: 'Spacious warehouse great for small business',
        price: '$ 3,125,000',
        type: 'warehouse',
        bed: 4,
        bath: 4,
        size: 800,
        position: {
            lat: 37.39561833718522,
            lng: -122.21855116258479,
        },
    },
    {
        address: '98 Aleh Ave, Palo Alto, CA',
        description: 'A lovely store on busy road',
        price: '$ 4,225,000',
        type: 'store-alt',
        bed: 2,
        bath: 1,
        size: 210,
        position: {
            lat: 37.423928529779644,
            lng: -122.1087629822001,
        },
    },
    {
        address: '2117 Su St, MountainView, CA',
        description: 'Single family house near golf club',
        price: '$ 1,700,000',
        type: 'home',
        bed: 4,
        bath: 3,
        size: 200,
        position: {
            lat: 37.40578635332598,
            lng: -122.15043378466069,
        },
    },
    {
        address: '197 Alicia Dr, Santa Clara, CA',
        description: 'Multifloor large warehouse',
        price: '$ 5,000,000',
        type: 'warehouse',
        bed: 5,
        bath: 4,
        size: 700,
        position: {
            lat: 37.36399747905774,
            lng: -122.10465384268522,
        },
    },
    {
        address: '700 Jose Ave, Sunnyvale, CA',
        description: '3 storey townhouse with 2 car garage',
        price: '$ 3,850,000',
        type: 'building',
        bed: 4,
        bath: 4,
        size: 600,
        position: {
            lat: 37.38343706184458,
            lng: -122.02340436985183,
        },
    },
    {
        address: '868 Will Ct, Cupertino, CA',
        description: 'Single family house in great school zone',
        price: '$ 2,500,000',
        type: 'home',
        bed: 3,
        bath: 2,
        size: 100,
        position: {
            lat: 37.34576403052,
            lng: -122.04455090047453,
        },
    },
    {
        address: '655 Haylee St, Santa Clara, CA',
        description: '2 storey store with large storage room',
        price: '$ 2,500,000',
        type: 'store-alt',
        bed: 3,
        bath: 2,
        size: 450,
        position: {
            lat: 37.362863347890716,
            lng: -121.97802139023555,
        },
    },
    {
        address: '2019 Natasha Dr, San Jose, CA',
        description: 'Single family house',
        price: '$ 2,325,000',
        type: 'home',
        bed: 4,
        bath: 3.5,
        size: 500,
        position: {
            lat: 37.41391636421949,
            lng: -121.94592071575907,
        },
    },
];

initMap();index.ts

JavaScript

async function initMap() {
    // Request needed libraries.
    const { Map } = (await google.maps.importLibrary('maps'));
    const { AdvancedMarkerElement } = (await google.maps.importLibrary('marker'));
    const center = { lat: 37.43238031167444, lng: -122.16795397128632 };
    const map = new Map(document.getElementById('map'), {
        zoom: 11,
        center,
        mapId: '4504f8b37365c3d0',
    });
    for (const property of properties) {
        const advancedMarkerElement = new google.maps.marker.AdvancedMarkerElement({
            map,
            content: buildContent(property),
            position: property.position,
            title: property.description,
        });
        advancedMarkerElement.addListener('click', () => {
            toggleHighlight(advancedMarkerElement, property);
        });
    }
}
function toggleHighlight(markerView, property) {
    if (markerView.content.classList.contains('highlight')) {
        markerView.content.classList.remove('highlight');
        markerView.zIndex = null;
    }
    else {
        markerView.content.classList.add('highlight');
        markerView.zIndex = 1;
    }
}
function buildContent(property) {
    const content = document.createElement('div');
    content.classList.add('property');
    content.innerHTML = `
    <div class="icon">
        <i aria-hidden="true" class="fa fa-icon fa-${property.type}" title="${property.type}"></i>
        <span class="fa-sr-only">${property.type}</span>
    </div>
    <div class="details">
        <div class="price">${property.price}</div>
        <div class="address">${property.address}</div>
        <div class="features">
        <div>
            <i aria-hidden="true" class="fa fa-bed fa-lg bed" title="bedroom"></i>
            <span class="fa-sr-only">bedroom</span>
            <span>${property.bed}</span>
        </div>
        <div>
            <i aria-hidden="true" class="fa fa-bath fa-lg bath" title="bathroom"></i>
            <span class="fa-sr-only">bathroom</span>
            <span>${property.bath}</span>
        </div>
        <div>
            <i aria-hidden="true" class="fa fa-ruler fa-lg size" title="size"></i>
            <span class="fa-sr-only">size</span>
            <span>${property.size} ft<sup>2</sup></span>
        </div>
        </div>
    </div>
    `;
    return content;
}
const properties = [
    {
        address: '215 Emily St, MountainView, CA',
        description: 'Single family house with modern design',
        price: '$ 3,889,000',
        type: 'home',
        bed: 5,
        bath: 4.5,
        size: 300,
        position: {
            lat: 37.50024109655184,
            lng: -122.28528451834352,
        },
    },
    {
        address: '108 Squirrel Ln &#128063;, Menlo Park, CA',
        description: 'Townhouse with friendly neighbors',
        price: '$ 3,050,000',
        type: 'building',
        bed: 4,
        bath: 3,
        size: 200,
        position: {
            lat: 37.44440882321596,
            lng: -122.2160620727,
        },
    },
    {
        address: '100 Chris St, Portola Valley, CA',
        description: 'Spacious warehouse great for small business',
        price: '$ 3,125,000',
        type: 'warehouse',
        bed: 4,
        bath: 4,
        size: 800,
        position: {
            lat: 37.39561833718522,
            lng: -122.21855116258479,
        },
    },
    {
        address: '98 Aleh Ave, Palo Alto, CA',
        description: 'A lovely store on busy road',
        price: '$ 4,225,000',
        type: 'store-alt',
        bed: 2,
        bath: 1,
        size: 210,
        position: {
            lat: 37.423928529779644,
            lng: -122.1087629822001,
        },
    },
    {
        address: '2117 Su St, MountainView, CA',
        description: 'Single family house near golf club',
        price: '$ 1,700,000',
        type: 'home',
        bed: 4,
        bath: 3,
        size: 200,
        position: {
            lat: 37.40578635332598,
            lng: -122.15043378466069,
        },
    },
    {
        address: '197 Alicia Dr, Santa Clara, CA',
        description: 'Multifloor large warehouse',
        price: '$ 5,000,000',
        type: 'warehouse',
        bed: 5,
        bath: 4,
        size: 700,
        position: {
            lat: 37.36399747905774,
            lng: -122.10465384268522,
        },
    },
    {
        address: '700 Jose Ave, Sunnyvale, CA',
        description: '3 storey townhouse with 2 car garage',
        price: '$ 3,850,000',
        type: 'building',
        bed: 4,
        bath: 4,
        size: 600,
        position: {
            lat: 37.38343706184458,
            lng: -122.02340436985183,
        },
    },
    {
        address: '868 Will Ct, Cupertino, CA',
        description: 'Single family house in great school zone',
        price: '$ 2,500,000',
        type: 'home',
        bed: 3,
        bath: 2,
        size: 100,
        position: {
            lat: 37.34576403052,
            lng: -122.04455090047453,
        },
    },
    {
        address: '655 Haylee St, Santa Clara, CA',
        description: '2 storey store with large storage room',
        price: '$ 2,500,000',
        type: 'store-alt',
        bed: 3,
        bath: 2,
        size: 450,
        position: {
            lat: 37.362863347890716,
            lng: -121.97802139023555,
        },
    },
    {
        address: '2019 Natasha Dr, San Jose, CA',
        description: 'Single family house',
        price: '$ 2,325,000',
        type: 'home',
        bed: 4,
        bath: 3.5,
        size: 500,
        position: {
            lat: 37.41391636421949,
            lng: -121.94592071575907,
        },
    },
];
initMap();index.js

CSS

:root {
    --building-color: #ff9800;
    --house-color: #0288d1;
    --shop-color: #7b1fa2;
    --warehouse-color: #558b2f;
}

/*
 * Optional: Makes the sample page fill the window.
 */
html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}

/*
 * Always set the map height explicitly to define the size of the div element
 * that contains the map.
 */
#map {
    height: 100%;
    width: 100%;
}

/*
 * Property styles in unhighlighted state.
 */
.property {
    align-items: center;
    background-color: #ffffff;
    border-radius: 50%;
    color: #263238;
    display: flex;
    font-size: 14px;
    gap: 15px;
    height: 30px;
    justify-content: center;
    padding: 4px;
    position: relative;
    position: relative;
    transition: all 0.3s ease-out;
    width: 30px;
    transform: translateY(-9px);
}

.property::after {
    border-left: 9px solid transparent;
    border-right: 9px solid transparent;
    border-top: 9px solid #ffffff;
    content: '';
    height: 0;
    left: 50%;
    position: absolute;
    top: 95%;
    transform: translate(-50%, 0);
    transition: all 0.3s ease-out;
    width: 0;
    z-index: 1;
}

.property .icon {
    align-items: center;
    display: flex;
    justify-content: center;
    color: #ffffff;
}

.property .icon svg {
    height: 20px;
    width: auto;
}

.property .details {
    display: none;
    flex-direction: column;
    flex: 1;
}

.property .address {
    color: #9e9e9e;
    font-size: 10px;
    margin-bottom: 10px;
    margin-top: 5px;
}

.property .features {
    align-items: flex-end;
    display: flex;
    flex-direction: row;
    gap: 10px;
}

.property .features > div {
    align-items: center;
    background: #f5f5f5;
    border-radius: 5px;
    border: 1px solid #ccc;
    display: flex;
    font-size: 10px;
    gap: 5px;
    padding: 5px;
}

/*
 * Property styles in highlighted state.
 */
.property.highlight {
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 10px 10px 5px rgba(0, 0, 0, 0.2);
    height: 80px;
    padding: 8px 15px;
    width: auto;
}

.property.highlight::after {
    border-top: 9px solid #ffffff;
}

.property.highlight .details {
    display: flex;
}

.property.highlight .icon svg {
    width: 50px;
    height: 50px;
}

.property .bed {
    color: #ffa000;
}

.property .bath {
    color: #03a9f4;
}

.property .size {
    color: #388e3c;
}

/*
 * House icon colors.
 */
.property.highlight:has(.fa-house) .icon {
    color: var(--house-color);
}

.property:not(.highlight):has(.fa-house) {
    background-color: var(--house-color);
}

.property:not(.highlight):has(.fa-house)::after {
    border-top: 9px solid var(--house-color);
}

/*
 * Building icon colors.
 */
.property.highlight:has(.fa-building) .icon {
    color: var(--building-color);
}

.property:not(.highlight):has(.fa-building) {
    background-color: var(--building-color);
}

.property:not(.highlight):has(.fa-building)::after {
    border-top: 9px solid var(--building-color);
}

/*
 * Warehouse icon colors.
 */
.property.highlight:has(.fa-warehouse) .icon {
    color: var(--warehouse-color);
}

.property:not(.highlight):has(.fa-warehouse) {
    background-color: var(--warehouse-color);
}

.property:not(.highlight):has(.fa-warehouse)::after {
    border-top: 9px solid var(--warehouse-color);
}

/*
 * Shop icon colors.
 */
.property.highlight:has(.fa-shop) .icon {
    color: var(--shop-color);
}

.property:not(.highlight):has(.fa-shop) {
    background-color: var(--shop-color);
}

.property:not(.highlight):has(.fa-shop)::after {
    border-top: 9px solid var(--shop-color);
}
style.css

HTML

<html>
    <head>
        <title>Advanced Markers with HTML</title>

        <script src="https://use.fontawesome.com/releases/v6.2.0/js/all.js"></script>

        <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: "weekly"});</script>
    </body>
</html>index.html

サンプルを試す

JSFiddle.net

アニメーション付きのマーカー

このサンプルでは、定番の「バウンド接地」のアニメーションを、CSS と高度なマーカーを使って作成しています。IntersectionObserver には、CSS スタイル drop が追加されています。IntersectionObserver は、各マーカーがビューポートに入る瞬間を検知してスタイルを適用します。createMarker() 関数がマーカーごとに追加されている animationend イベントリスナーがスタイルを削除します。

ソースの確認

TypeScript

/**
 * Returns a random lat lng position within the map bounds.
 * @param {!google.maps.Map} map
 * @return {!google.maps.LatLngLiteral}
 */
function getRandomPosition(map) {
    const bounds = map.getBounds();
    const minLat = bounds.getSouthWest().lat();
    const minLng = bounds.getSouthWest().lng();
    const maxLat = bounds.getNorthEast().lat();
    const maxLng = bounds.getNorthEast().lng();

    const latRange = maxLat - minLat;

    // Note: longitude can span from a positive longitude in the west to a
    // negative one in the east. e.g. 150lng (150E) <-> -30lng (30W) is a large
    // span that covers the whole USA.
    let lngRange = maxLng - minLng;
    if (maxLng < minLng) {
        lngRange += 360;
    }

    return {
        lat: minLat + Math.random() * latRange,
        lng: minLng + Math.random() * lngRange,
    };
}

const total = 100;
const intersectionObserver = new IntersectionObserver((entries) => {
    for (const entry of entries) {
        if (entry.isIntersecting) {
            entry.target.classList.add('drop');
            intersectionObserver.unobserve(entry.target);
        }
    }
});

async function initMap(): Promise<void> {
    // Request needed libraries.
    const { Map } = (await google.maps.importLibrary(
        'maps'
    )) as google.maps.MapsLibrary;
    const { AdvancedMarkerElement, PinElement } =
        (await google.maps.importLibrary(
            'marker'
        )) as google.maps.MarkerLibrary;

    const position = { lat: 37.4242011827985, lng: -122.09242296450893 };

    const map = new Map(document.getElementById('map') as HTMLElement, {
        zoom: 14,
        center: position,
        mapId: '4504f8b37365c3d0',
    });

    // Create 100 markers to animate.
    google.maps.event.addListenerOnce(map, 'idle', () => {
        for (let i = 0; i < 100; i++) {
            createMarker(map, AdvancedMarkerElement, PinElement);
        }
    });

    // Add a button to reset the example.
    const controlDiv = document.createElement('div');
    const controlUI = document.createElement('button');

    controlUI.classList.add('ui-button');
    controlUI.innerText = 'Reset the example';
    controlUI.addEventListener('click', () => {
        // Reset the example by reloading the map iframe.
        refreshMap();
    });
    controlDiv.appendChild(controlUI);
    map.controls[google.maps.ControlPosition.TOP_CENTER].push(controlDiv);
}

function createMarker(map, AdvancedMarkerElement, PinElement) {
    const pinElement = new PinElement();
    const content = pinElement.element;
    const advancedMarker = new AdvancedMarkerElement({
        position: getRandomPosition(map),
        map: map,
        content: content,
    });

    content.style.opacity = '0';
    content.addEventListener('animationend', (event) => {
        content.classList.remove('drop');
        content.style.opacity = '1';
    });
    const time = 2 + Math.random(); // 2s delay for easy to see the animation
    content.style.setProperty('--delay-time', time + 's');
    intersectionObserver.observe(content);
}

function refreshMap() {
    // Refresh the map.
    const mapContainer = document.getElementById('mapContainer');
    const map = document.getElementById('map');
    map!.remove();
    const mapDiv = document.createElement('div');
    mapDiv.id = 'map';
    mapContainer!.appendChild(mapDiv);
    initMap();
}

initMap();index.ts

JavaScript

/**
 * Returns a random lat lng position within the map bounds.
 * @param {!google.maps.Map} map
 * @return {!google.maps.LatLngLiteral}
 */
function getRandomPosition(map) {
    const bounds = map.getBounds();
    const minLat = bounds.getSouthWest().lat();
    const minLng = bounds.getSouthWest().lng();
    const maxLat = bounds.getNorthEast().lat();
    const maxLng = bounds.getNorthEast().lng();
    const latRange = maxLat - minLat;
    // Note: longitude can span from a positive longitude in the west to a
    // negative one in the east. e.g. 150lng (150E) <-> -30lng (30W) is a large
    // span that covers the whole USA.
    let lngRange = maxLng - minLng;
    if (maxLng < minLng) {
        lngRange += 360;
    }
    return {
        lat: minLat + Math.random() * latRange,
        lng: minLng + Math.random() * lngRange,
    };
}
const total = 100;
const intersectionObserver = new IntersectionObserver((entries) => {
    for (const entry of entries) {
        if (entry.isIntersecting) {
            entry.target.classList.add('drop');
            intersectionObserver.unobserve(entry.target);
        }
    }
});
async function initMap() {
    // Request needed libraries.
    const { Map } = (await google.maps.importLibrary('maps'));
    const { AdvancedMarkerElement, PinElement } = (await google.maps.importLibrary('marker'));
    const position = { lat: 37.4242011827985, lng: -122.09242296450893 };
    const map = new Map(document.getElementById('map'), {
        zoom: 14,
        center: position,
        mapId: '4504f8b37365c3d0',
    });
    // Create 100 markers to animate.
    google.maps.event.addListenerOnce(map, 'idle', () => {
        for (let i = 0; i < 100; i++) {
            createMarker(map, AdvancedMarkerElement, PinElement);
        }
    });
    // Add a button to reset the example.
    const controlDiv = document.createElement('div');
    const controlUI = document.createElement('button');
    controlUI.classList.add('ui-button');
    controlUI.innerText = 'Reset the example';
    controlUI.addEventListener('click', () => {
        // Reset the example by reloading the map iframe.
        refreshMap();
    });
    controlDiv.appendChild(controlUI);
    map.controls[google.maps.ControlPosition.TOP_CENTER].push(controlDiv);
}
function createMarker(map, AdvancedMarkerElement, PinElement) {
    const pinElement = new PinElement();
    const content = pinElement.element;
    const advancedMarker = new AdvancedMarkerElement({
        position: getRandomPosition(map),
        map: map,
        content: content,
    });
    content.style.opacity = '0';
    content.addEventListener('animationend', (event) => {
        content.classList.remove('drop');
        content.style.opacity = '1';
    });
    const time = 2 + Math.random(); // 2s delay for easy to see the animation
    content.style.setProperty('--delay-time', time + 's');
    intersectionObserver.observe(content);
}
function refreshMap() {
    // Refresh the map.
    const mapContainer = document.getElementById('mapContainer');
    const map = document.getElementById('map');
    map.remove();
    const mapDiv = document.createElement('div');
    mapDiv.id = 'map';
    mapContainer.appendChild(mapDiv);
    initMap();
}
initMap();index.js

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;
}

/* set the default transition time */
:root {
    --delay-time: 0.5s;
}

#map {
    height: 100%;
}

#mapContainer {
    height: 100%;
}

html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}

@keyframes drop {
    0% {
        transform: translateY(-200px) scaleY(0.9);
        opacity: 0;
    }
    5% {
        opacity: 0.7;
    }
    50% {
        transform: translateY(0px) scaleY(1);
        opacity: 1;
    }
    65% {
        transform: translateY(-17px) scaleY(0.9);
        opacity: 1;
    }
    75% {
        transform: translateY(-22px) scaleY(0.9);
        opacity: 1;
    }
    100% {
        transform: translateY(0px) scaleY(1);
        opacity: 1;
    }
}
.drop {
    animation: drop 0.3s linear forwards var(--delay-time);
}

.ui-button {
    background-color: #fff;
    border: 0;
    border-radius: 2px;
    box-shadow: 0 1px 4px -1px rgba(0, 0, 0, 0.3);
    margin: 10px;
    padding: 0 0.5em;
    font:
        400 18px Roboto,
        Arial,
        sans-serif;
    overflow: hidden;
    height: 40px;
    cursor: pointer;
}

.ui-button:hover {
    background: rgb(235, 235, 235);
}
style.css

HTML

<html>
    <head>
        <title>Advanced Markers CSS Animation</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.js"></script>
    </head>
    <body>
        <div id="mapContainer">
            <div id="map" style="height: 100%"></div>
        </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: "weekly"});</script>
    </body>
</html>index.html

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