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Marker Animations With setTimeout()

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Page Summary

google.maps.Marker is deprecated, with google.maps.marker.AdvancedMarkerElement being the recommended replacement.
This example demonstrates using window.setTimeout() to animate markers dropping onto the map sequentially.
A "Drop Markers" button triggers the animation, placing markers at predefined neighborhood locations.
Sample code is provided in TypeScript and JavaScript, alongside CSS and HTML for styling and structure.

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.

[フレーム]

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.
constneighborhoods: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},
];
letmarkers:google.maps.Marker[]=[];
letmap:google.maps.Map;
functioninitMap():void{
map=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{
zoom:12,
center:{lat:52.52,lng:13.41},
});
document.getElementById("drop")!.addEventListener("click",drop);
}
functiondrop():void{
clearMarkers();
for(leti=0;i < neighborhoods.length;i++){
addMarkerWithTimeout(neighborhoods[i],i*200);
}
}
functionaddMarkerWithTimeout(
position:google.maps.LatLngLiteral,
timeout:number
):void{
window.setTimeout(()=>{
markers.push(
newgoogle.maps.Marker({
position:position,
map,
animation:google.maps.Animation.DROP,
})
);
},timeout);
}
functionclearMarkers():void{
for(leti=0;i < markers.length;i++){
markers[i].setMap(null);
}
markers=[];
}
declareglobal{
interfaceWindow{
initMap:()=>void;
}
}
window.initMap=initMap;index.ts

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.
constneighborhoods=[
{lat:52.511,lng:13.447},
{lat:52.549,lng:13.422},
{lat:52.497,lng:13.396},
{lat:52.517,lng:13.394},
];
letmarkers=[];
letmap;
functioninitMap(){
map=newgoogle.maps.Map(document.getElementById("map"),{
zoom:12,
center:{lat:52.52,lng:13.41},
});
document.getElementById("drop").addEventListener("click",drop);
}
functiondrop(){
clearMarkers();
for(leti=0;i < neighborhoods.length;i++){
addMarkerWithTimeout(neighborhoods[i],i*200);
}
}
functionaddMarkerWithTimeout(position,timeout){
window.setTimeout(()=>{
markers.push(
newgoogle.maps.Marker({
position:position,
map,
animation:google.maps.Animation.DROP,
}),
);
},timeout);
}
functionclearMarkers(){
for(leti=0;i < markers.length;i++){
markers[i].setMap(null);
}
markers=[];
}
window.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;
}
#floating-panel{
position:absolute;
top:10px;
left:25%;
z-index:5;
background-color:#fff;
padding:5px;
border:1pxsolid#999;
text-align:center;
font-family:"Roboto","sans-serif";
line-height:30px;
padding-left:10px;
}
#floating-panel{
margin-left:-52px;
}
style.css

HTML

<html>
 <head>
 <title>Marker Animations With setTimeout()</title>
 <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>index.html

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.

gitclone-bsample-marker-animations-iterationhttps://github.com/googlemaps/js-samples.git
cdjs-samples
npmi
npmstart

Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME.

gitcheckoutsample-SAMPLE_NAME
npmi
npmstart