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 map = new google.maps.Map(
document.getElementById("map") as HTMLElement,
{
zoom: 4,
center: { lat: -25.363882, lng: 131.044922 },
mapId: "DEMO_MAP_ID",
}
);
const bounds: google.maps.LatLngBoundsLiteral = {
north: -25.363882,
south: -31.203405,
east: 131.044922,
west: 125.244141,
};
// Display the area between the location southWest and northEast.
map.fitBounds(bounds);
// Add 5 markers to map at random locations.
// For each of these markers, give them a title with their index, and when
// they are clicked they should open an infowindow with text from a secret
// message.
const secretMessages = ["This", "is", "the", "secret", "message"];
const lngSpan = bounds.east - bounds.west;
const latSpan = bounds.north - bounds.south;
for (let i = 0; i < secretMessages.length; ++i) {
const marker = new google.maps.marker.AdvancedMarkerElement({
position: {
lat: bounds.south + latSpan * Math.random(),
lng: bounds.west + lngSpan * Math.random(),
},
map: map,
});
attachSecretMessage(marker, secretMessages[i]);
}
}
// Attaches an info window to a marker with the provided message. When the
// marker is clicked, the info window will open with the secret message.
function attachSecretMessage(
marker: google.maps.marker.AdvancedMarkerElement,
secretMessage: string
) {
const infowindow = new google.maps.InfoWindow({
content: secretMessage,
});
marker.addListener("click", () => {
infowindow.open(marker.map, marker);
});
}
initMap();
JavaScript
async function initMap() {
// Request needed libraries.
const { Map } = await google.maps.importLibrary("maps");
const { AdvancedMarkerElement } = await google.maps.importLibrary("marker");
const map = new google.maps.Map(document.getElementById("map"), {
zoom: 4,
center: { lat: -25.363882, lng: 131.044922 },
mapId: "DEMO_MAP_ID",
});
const bounds = {
north: -25.363882,
south: -31.203405,
east: 131.044922,
west: 125.244141,
};
// Display the area between the location southWest and northEast.
map.fitBounds(bounds);
// Add 5 markers to map at random locations.
// For each of these markers, give them a title with their index, and when
// they are clicked they should open an infowindow with text from a secret
// message.
const secretMessages = ["This", "is", "the", "secret", "message"];
const lngSpan = bounds.east - bounds.west;
const latSpan = bounds.north - bounds.south;
for (let i = 0; i < secretMessages.length; ++i) {
const marker = new google.maps.marker.AdvancedMarkerElement({
position: {
lat: bounds.south + latSpan * Math.random(),
lng: bounds.west + lngSpan * Math.random(),
},
map: map,
});
attachSecretMessage(marker, secretMessages[i]);
}
}
// Attaches an info window to a marker with the provided message. When the
// marker is clicked, the info window will open with the secret message.
function attachSecretMessage(marker, secretMessage) {
const infowindow = new google.maps.InfoWindow({
content: secretMessage,
});
marker.addListener("click", () => {
infowindow.open(marker.map, marker);
});
}
initMap();
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
<html>
<head>
<title>Using Closures in Event Listeners</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></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: "AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg", v: "weekly"});</script>
</body>
</html>