This example uses
window.setTimeout()
to place markers on the map
consecutively rather than all at once when a
Drop Markers
button is
clicked.
Read the
documentation
.
TypeScript
// If you're adding a number of markers, you may want to drop them on the map
// consecutively rather than all at once. This example shows how to use
// window.setTimeout() to space your markers' animation.
const neighborhoods: google.maps.LatLngLiteral[] = [
{ lat: 52.511, lng: 13.447 },
{ lat: 52.549, lng: 13.422 },
{ lat: 52.497, lng: 13.396 },
{ lat: 52.517, lng: 13.394 },
];
let markers: google.maps.Marker[] = [];
let map: google.maps.Map;
function initMap(): void {
map = new google.maps.Map(document.getElementById("map") as HTMLElement, {
zoom: 12,
center: { lat: 52.52, lng: 13.41 },
});
document.getElementById("drop")!.addEventListener("click", drop);
}
function drop(): void {
clearMarkers();
for (let i = 0; i < neighborhoods.length; i++) {
addMarkerWithTimeout(neighborhoods[i], i * 200);
}
}
function addMarkerWithTimeout(
position: google.maps.LatLngLiteral,
timeout: number
): void {
window.setTimeout(() => {
markers.push(
new google.maps.Marker({
position: position,
map,
animation: google.maps.Animation.DROP,
})
);
}, timeout);
}
function clearMarkers(): void {
for (let i = 0; i < markers.length; i++) {
markers[i].setMap(null);
}
markers = [];
}
declare global {
interface Window {
initMap: () => void;
}
}
window.initMap = initMap;
JavaScript
// If you're adding a number of markers, you may want to drop them on the map
// consecutively rather than all at once. This example shows how to use
// window.setTimeout() to space your markers' animation.
const neighborhoods = [
{ lat: 52.511, lng: 13.447 },
{ lat: 52.549, lng: 13.422 },
{ lat: 52.497, lng: 13.396 },
{ lat: 52.517, lng: 13.394 },
];
let markers = [];
let map;
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
zoom: 12,
center: { lat: 52.52, lng: 13.41 },
});
document.getElementById("drop").addEventListener("click", drop);
}
function drop() {
clearMarkers();
for (let i = 0; i < neighborhoods.length; i++) {
addMarkerWithTimeout(neighborhoods[i], i * 200);
}
}
function addMarkerWithTimeout(position, timeout) {
window.setTimeout(() => {
markers.push(
new google.maps.Marker({
position: position,
map,
animation: google.maps.Animation.DROP,
}),
);
}, timeout);
}
function clearMarkers() {
for (let i = 0; i < markers.length; i++) {
markers[i].setMap(null);
}
markers = [];
}
window.initMap = 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;
}
#floating-panel {
position: absolute;
top: 10px;
left: 25%;
z-index: 5;
background-color: #fff;
padding: 5px;
border: 1px solid #999;
text-align: center;
font-family: "Roboto", "sans-serif";
line-height: 30px;
padding-left: 10px;
}
#floating-panel {
margin-left: -52px;
}
HTML
<html>
<head>
<title>Marker Animations With setTimeout()</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="floating-panel">
<button id="drop">Drop Markers</button>
</div>
<div id="map"></div>
<!--
The `defer` attribute causes the script to execute after the full HTML
document has been parsed. For non-blocking uses, avoiding race conditions,
and consistent behavior across browsers, consider loading using Promises. See
https://developers.google.com/maps/documentation/javascript/load-maps-js-api
for more information.
-->
<script
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=weekly"
defer
></script>
</body>
</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 -b sample-marker-animations-iteration https://github.com/googlemaps/js-samples.git
cd js-samples
npm i
npm start
Other samples can be tried by switching to any branch beginning with
sample-
SAMPLE_NAME
.
git checkout sample-
SAMPLE_NAME
npm i
npm start