// 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;
// 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;
/** 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>
<head>
<title>Polygon Arrays</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>
Git and Node.js are required to run this sample locally. Follow theseinstructionsto install Node.js and NPM. The following commands clone, install dependencies and start the sample application.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[[["\u003cp\u003eThis example demonstrates creating and displaying a polygon on a map using the Google Maps JavaScript API.\u003c/p\u003e\n"],["\u003cp\u003eThe polygon is interactive, displaying an info window with coordinate details upon clicking.\u003c/p\u003e\n"],["\u003cp\u003eThe code provides examples in both JavaScript and TypeScript, showcasing how to define polygon properties and handle events.\u003c/p\u003e\n"],["\u003cp\u003eUsers can interact with a live demo of the map via provided links to JSFiddle and Google Cloud Shell.\u003c/p\u003e\n"],["\u003cp\u003eThe sample code can be cloned and run locally using Git and Node.js for further exploration and customization.\u003c/p\u003e\n"]]],["This code creates a map with a polygon representing the Bermuda Triangle. Upon clicking the polygon, an info window appears. This window displays the coordinates of the clicked location and lists each vertex's coordinates within the polygon. The process includes defining polygon coordinates, constructing the polygon, adding a click event listener, and generating dynamic content for the info window, showing both the click and vertex locations.\n"],null,["# Polygon Arrays\n\nThis example creates a map with a simple polygon which displays information in\nresponse to a click event.\n\nRead the [documentation](/maps/documentation/javascript/shapes#polygon_add). \n\n### TypeScript\n\n```typescript\n// This example creates a simple polygon representing the Bermuda Triangle.\n// When the user clicks on the polygon an info window opens, showing\n// information about the polygon's coordinates.\n\nlet map: google.maps.Map;\n\nlet infoWindow: google.maps.InfoWindow;\n\nfunction initMap(): void {\n map = new google.maps.Map(document.getElementById(\"map\") as HTMLElement, {\n zoom: 5,\n center: { lat: 24.886, lng: -70.268 },\n mapTypeId: \"terrain\",\n });\n\n // Define the LatLng coordinates for the polygon.\n const triangleCoords: google.maps.LatLngLiteral[] = [\n { lat: 25.774, lng: -80.19 },\n { lat: 18.466, lng: -66.118 },\n { lat: 32.321, lng: -64.757 },\n ];\n\n // Construct the polygon.\n const bermudaTriangle = new google.maps.Polygon({\n paths: triangleCoords,\n strokeColor: \"#FF0000\",\n strokeOpacity: 0.8,\n strokeWeight: 3,\n fillColor: \"#FF0000\",\n fillOpacity: 0.35,\n });\n\n bermudaTriangle.setMap(map);\n\n // Add a listener for the click event.\n bermudaTriangle.addListener(\"click\", showArrays);\n\n infoWindow = new google.maps.InfoWindow();\n}\n\nfunction showArrays(event: any) {\n // Since this polygon has only one path, we can call getPath() to return the\n // MVCArray of LatLngs.\n // @ts-ignore\n const polygon = this as google.maps.Polygon;\n const vertices = polygon.getPath();\n\n let contentString =\n \"\u003cb\u003eBermuda Triangle polygon\u003c/b\u003e\u003cbr\u003e\" +\n \"Clicked location: \u003cbr\u003e\" +\n event.latLng.lat() +\n \",\" +\n event.latLng.lng() +\n \"\u003cbr\u003e\";\n\n // Iterate over the vertices.\n for (let i = 0; i \u003c vertices.getLength(); i++) {\n const xy = vertices.getAt(i);\n\n contentString +=\n \"\u003cbr\u003e\" + \"Coordinate \" + i + \":\u003cbr\u003e\" + xy.lat() + \",\" + xy.lng();\n }\n\n // Replace the info window's content and position.\n infoWindow.setContent(contentString);\n infoWindow.setPosition(event.latLng);\n\n infoWindow.open(map);\n}\n\ndeclare global {\n interface Window {\n initMap: () =\u003e void;\n }\n}\nwindow.initMap = initMap;https://github.com/googlemaps/js-samples/blob/2683f7366fb27829401945d2a7e27d77ed2df8e5/samples/polygon-arrays/index.ts#L8-L83\n```\n| **Note:** Read the [guide](/maps/documentation/javascript/using-typescript) on using TypeScript and Google Maps.\n\n### JavaScript\n\n```javascript\n// This example creates a simple polygon representing the Bermuda Triangle.\n// When the user clicks on the polygon an info window opens, showing\n// information about the polygon's coordinates.\nlet map;\nlet infoWindow;\n\nfunction initMap() {\n map = new google.maps.Map(document.getElementById(\"map\"), {\n zoom: 5,\n center: { lat: 24.886, lng: -70.268 },\n mapTypeId: \"terrain\",\n });\n\n // Define the LatLng coordinates for the polygon.\n const triangleCoords = [\n { lat: 25.774, lng: -80.19 },\n { lat: 18.466, lng: -66.118 },\n { lat: 32.321, lng: -64.757 },\n ];\n // Construct the polygon.\n const bermudaTriangle = new google.maps.Polygon({\n paths: triangleCoords,\n strokeColor: \"#FF0000\",\n strokeOpacity: 0.8,\n strokeWeight: 3,\n fillColor: \"#FF0000\",\n fillOpacity: 0.35,\n });\n\n bermudaTriangle.setMap(map);\n // Add a listener for the click event.\n bermudaTriangle.addListener(\"click\", showArrays);\n infoWindow = new google.maps.InfoWindow();\n}\n\nfunction showArrays(event) {\n // Since this polygon has only one path, we can call getPath() to return the\n // MVCArray of LatLngs.\n // @ts-ignore\n const polygon = this;\n const vertices = polygon.getPath();\n let contentString =\n \"\u003cb\u003eBermuda Triangle polygon\u003c/b\u003e\u003cbr\u003e\" +\n \"Clicked location: \u003cbr\u003e\" +\n event.latLng.lat() +\n \",\" +\n event.latLng.lng() +\n \"\u003cbr\u003e\";\n\n // Iterate over the vertices.\n for (let i = 0; i \u003c vertices.getLength(); i++) {\n const xy = vertices.getAt(i);\n\n contentString +=\n \"\u003cbr\u003e\" + \"Coordinate \" + i + \":\u003cbr\u003e\" + xy.lat() + \",\" + xy.lng();\n }\n\n // Replace the info window's content and position.\n infoWindow.setContent(contentString);\n infoWindow.setPosition(event.latLng);\n infoWindow.open(map);\n}\n\nwindow.initMap = initMap;https://github.com/googlemaps/js-samples/blob/2683f7366fb27829401945d2a7e27d77ed2df8e5/dist/samples/polygon-arrays/docs/index.js#L7-L70\n```\n| **Note:** The JavaScript is compiled from the TypeScript snippet.\n\n### CSS\n\n```css\n/* \n * Always set the map height explicitly to define the size of the div element\n * that contains the map. \n */\n#map {\n height: 100%;\n}\n\n/* \n * Optional: Makes the sample page fill the window. \n */\nhtml,\nbody {\n height: 100%;\n margin: 0;\n padding: 0;\n}\nhttps://github.com/googlemaps/js-samples/blob/2683f7366fb27829401945d2a7e27d77ed2df8e5/dist/samples/polygon-arrays/docs/style.css#L7-L24\n```\n\n### HTML\n\n```html\n\u003chtml\u003e\n \u003chead\u003e\n \u003ctitle\u003ePolygon Arrays\u003c/title\u003e\n\n \u003clink rel=\"stylesheet\" type=\"text/css\" href=\"./style.css\" /\u003e\n \u003cscript type=\"module\" src=\"./index.js\"\u003e\u003c/script\u003e\n \u003c/head\u003e\n \u003cbody\u003e\n \u003cdiv id=\"map\"\u003e\u003c/div\u003e\n\n \u003c!-- \n The `defer` attribute causes the script to execute after the full HTML\n document has been parsed. For non-blocking uses, avoiding race conditions,\n and consistent behavior across browsers, consider loading using Promises. See\n https://developers.google.com/maps/documentation/javascript/load-maps-js-api\n for more information.\n --\u003e\n \u003cscript\n src=\"https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=weekly\"\n defer\n \u003e\u003c/script\u003e\n \u003c/body\u003e\n\u003c/html\u003ehttps://github.com/googlemaps/js-samples/blob/2683f7366fb27829401945d2a7e27d77ed2df8e5/dist/samples/polygon-arrays/docs/index.html#L8-L30\n```\n\n### Try Sample\n\n[JSFiddle.net](https://jsfiddle.net/gh/get/library/pure/googlemaps/js-samples/tree/master/dist/samples/polygon-arrays/jsfiddle) [Google Cloud Shell](https://ssh.cloud.google.com/cloudshell/editor?cloudshell_git_repo=https%3A%2F%2Fgithub.com%2Fgooglemaps%2Fjs-samples&cloudshell_git_branch=sample-polygon-arrays&cloudshell_tutorial=cloud_shell_instructions.md&cloudshell_workspace=.)\n\n### Clone Sample\n\n\nGit and Node.js are required to run this sample locally. Follow these [instructions](https://docs.npmjs.com/downloading-and-installing-node-js-and-npm) to install Node.js and NPM. The following commands clone, install dependencies and start the sample application. \n\n git clone -b sample-polygon-arrays https://github.com/googlemaps/js-samples.git\n cd js-samples\n npm i\n npm start\n\n\nOther samples can be tried by switching to any branch beginning with `sample-`\u003cvar translate=\"no\"\u003eSAMPLE_NAME\u003c/var\u003e. \n\n git checkout sample-\u003cvar translate=\"no\"\u003e\u003cspan class=\"devsite-syntax-nx\"\u003eSAMPLE_NAME\u003c/span\u003e\u003c/var\u003e\n npm i\n npm start"]]
