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Rectangles

  • This code demonstrates adding a red rectangle overlay to a Google Map.

  • The rectangle's appearance (color, opacity, stroke) and geographic boundaries are customizable within the code.

  • Both JavaScript and TypeScript examples are provided, showcasing how to implement the functionality in either language.

  • The sample HTML sets up the map container and includes necessary JavaScript libraries for Google Maps integration.

  • Users can try the sample directly via JSFiddle or Google Cloud Shell, or clone and run the code locally using Git and Node.js.

This example adds a red rectangle to a map.

Read thedocumentation.

TypeScript

// This example adds a red rectangle to a map.functioninitMap():void{constmap=newgoogle.maps.Map(document.getElementById("map")asHTMLElement,{zoom:11,center:{lat:33.678,lng:-116.243},mapTypeId:"terrain",});constrectangle=newgoogle.maps.Rectangle({strokeColor:"#FF0000",strokeOpacity:0.8,strokeWeight:2,fillColor:"#FF0000",fillOpacity:0.35,map,bounds:{north:33.685,south:33.671,east:-116.234,west:-116.251,},});}declareglobal{interfaceWindow{initMap:()=>void;}}window.initMap=initMap;
Note: Read theguide on using TypeScript and Google Maps.

JavaScript

// This example adds a red rectangle to a map.functioninitMap(){constmap=newgoogle.maps.Map(document.getElementById("map"),{zoom:11,center:{lat:33.678,lng:-116.243},mapTypeId:"terrain",});constrectangle=newgoogle.maps.Rectangle({strokeColor:"#FF0000",strokeOpacity:0.8,strokeWeight:2,fillColor:"#FF0000",fillOpacity:0.35,map,bounds:{north:33.685,south:33.671,east:-116.234,west:-116.251,},});}window.initMap=initMap;
Note: The JavaScript is compiled from the TypeScript snippet.

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>Rectangles</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-rectangle-simplehttps://github.com/googlemaps/js-samples.gitcdjs-samplesnpminpmstart

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

gitcheckoutsample-SAMPLE_NAMEnpminpmstart

Except as otherwise noted, the content of this page is licensed under theCreative Commons Attribution 4.0 License, and code samples are licensed under theApache 2.0 License. For details, see theGoogle Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-12-11 UTC.