Get a Maps Demo Key: Try out select Maps JavaScript API and Places UI Kit features at no cost with a Maps Demo Key—no billing information required.

Marker Labels

Spark icon

Page Summary

This example demonstrates how to add markers with alphabetical labels to a Google Map.
Users can click on the map to create new markers, each labeled with a unique letter.
The sample code is provided in both JavaScript and TypeScript, along with HTML and CSS for styling.
The legacy google.maps.Marker is deprecated, and migration to google.maps.marker.AdvancedMarkerElement is encouraged for future compatibility.

This example creates a map where each click by the user creates a marker that's labeled with a single alphabetic character.

Read the documentation.

[フレーム]

TypeScript

// In the following example, markers appear when the user clicks on the map.
// Each marker is labeled with a single alphabetical character.
constlabels="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
letlabelIndex=0;
functioninitMap():void{
constbangalore={lat:12.97,lng:77.59};
constmap=newgoogle.maps.Map(
document.getElementById("map")asHTMLElement,
{
zoom:12,
center:bangalore,
}
);
// This event listener calls addMarker() when the map is clicked.
google.maps.event.addListener(map,"click",(event)=>{
addMarker(event.latLng,map);
});
// Add a marker at the center of the map.
addMarker(bangalore,map);
}
// Adds a marker to the map.
functionaddMarker(location:google.maps.LatLngLiteral,map:google.maps.Map){
// Add the marker at the clicked location, and add the next-available label
// from the array of alphabetical characters.
newgoogle.maps.Marker({
position:location,
label:labels[labelIndex++%labels.length],
map:map,
});
}
declareglobal{
interfaceWindow{
initMap:()=>void;
}
}
window.initMap=initMap;index.ts

JavaScript

// In the following example, markers appear when the user clicks on the map.
// Each marker is labeled with a single alphabetical character.
constlabels="ABCDEFGHIJKLMNOPQRSTUVWXYZ";
letlabelIndex=0;
functioninitMap(){
constbangalore={lat:12.97,lng:77.59};
constmap=newgoogle.maps.Map(document.getElementById("map"),{
zoom:12,
center:bangalore,
});
// This event listener calls addMarker() when the map is clicked.
google.maps.event.addListener(map,"click",(event)=>{
addMarker(event.latLng,map);
});
// Add a marker at the center of the map.
addMarker(bangalore,map);
}
// Adds a marker to the map.
functionaddMarker(location,map){
// Add the marker at the clicked location, and add the next-available label
// from the array of alphabetical characters.
newgoogle.maps.Marker({
position:location,
label:labels[labelIndex++%labels.length],
map:map,
});
}
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;
}
style.css

HTML

<html>
 <head>
 <title>Marker Labels</title>
 <link rel="stylesheet" type="text/css" href="./style.css" />
 <script type="module" src="./index.js"></script>
 </head>
 <body>
 <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-labelshttps://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