Introducing Places UI Kit: A ready-to-use, low-cost component library that lets you bring the familiar Google Maps UI for Places to any map of your choice. Try it out, andshare your input to help shape the future of GMP!
Polygon Arrays
This example creates a map with a simple polygon which displays information inresponse to a click event.
Read thedocumentation.
TypeScript
// This example creates a simple polygon representing the Bermuda Triangle.// When the user clicks on the polygon an info window opens, showing// information about the polygon's coordinates.letmap:google.maps.Map;letinfoWindow:google.maps.InfoWindow;functioninitMap():void{map=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{zoom:5,center:{lat:24.886,lng:-70.268},mapTypeId:"terrain",});// Define the LatLng coordinates for the polygon.consttriangleCoords:google.maps.LatLngLiteral[]=[{lat:25.774,lng:-80.19},{lat:18.466,lng:-66.118},{lat:32.321,lng:-64.757},];// Construct the polygon.constbermudaTriangle=newgoogle.maps.Polygon({paths:triangleCoords,strokeColor:"#FF0000",strokeOpacity:0.8,strokeWeight:3,fillColor:"#FF0000",fillOpacity:0.35,});bermudaTriangle.setMap(map);// Add a listener for the click event.bermudaTriangle.addListener("click",showArrays);infoWindow=newgoogle.maps.InfoWindow();}functionshowArrays(event:any){// Since this polygon has only one path, we can call getPath() to return the// MVCArray of LatLngs.// @ts-ignoreconstpolygon=thisasgoogle.maps.Polygon;constvertices=polygon.getPath();letcontentString="<b>Bermuda Triangle polygon</b><br>"+"Clicked location: <br>"+event.latLng.lat()+","+event.latLng.lng()+"<br>";// Iterate over the vertices.for(leti=0;i <vertices.getLength();i++){constxy=vertices.getAt(i);contentString+="<br>"+"Coordinate "+i+":<br>"+xy.lat()+","+xy.lng();}// Replace the info window's content and position.infoWindow.setContent(contentString);infoWindow.setPosition(event.latLng);infoWindow.open(map);}declareglobal{interfaceWindow{initMap:()=>void;}}window.initMap=initMap;
JavaScript
// This example creates a simple polygon representing the Bermuda Triangle.// When the user clicks on the polygon an info window opens, showing// information about the polygon's coordinates.letmap;letinfoWindow;functioninitMap(){map=newgoogle.maps.Map(document.getElementById("map"),{zoom:5,center:{lat:24.886,lng:-70.268},mapTypeId:"terrain",});// Define the LatLng coordinates for the polygon.consttriangleCoords=[{lat:25.774,lng:-80.19},{lat:18.466,lng:-66.118},{lat:32.321,lng:-64.757},];// Construct the polygon.constbermudaTriangle=newgoogle.maps.Polygon({paths:triangleCoords,strokeColor:"#FF0000",strokeOpacity:0.8,strokeWeight:3,fillColor:"#FF0000",fillOpacity:0.35,});bermudaTriangle.setMap(map);// Add a listener for the click event.bermudaTriangle.addListener("click",showArrays);infoWindow=newgoogle.maps.InfoWindow();}functionshowArrays(event){// Since this polygon has only one path, we can call getPath() to return the// MVCArray of LatLngs.// @ts-ignoreconstpolygon=this;constvertices=polygon.getPath();letcontentString="<b>Bermuda Triangle polygon</b><br>"+"Clicked location: <br>"+event.latLng.lat()+","+event.latLng.lng()+"<br>";// Iterate over the vertices.for(leti=0;i <vertices.getLength();i++){constxy=vertices.getAt(i);contentString+="<br>"+"Coordinate "+i+":<br>"+xy.lat()+","+xy.lng();}// Replace the info window's content and position.infoWindow.setContent(contentString);infoWindow.setPosition(event.latLng);infoWindow.open(map);}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;}
HTML
<html> <head> <title>Polygon Arrays</title> <link rel="stylesheet" type="text/css" href="./style.css" /> <script type="module" src="./index.js"></script> </head> <body> <div></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 theseinstructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.
gitclone-bsample-polygon-arrayshttps://github.com/googlemaps/js-samples.gitcdjs-samplesnpminpmstart
Other samples can be tried by switching to any branch beginning withsample-SAMPLE_NAME.
gitcheckoutsample-SAMPLE_NAMEnpminpmstart
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Last updated 2025-07-18 UTC.