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Showing content from https://developers.google.com/maps/documentation/javascript/examples/user-editable-shapes below:

User-Editable Shapes | Maps JavaScript API

User-Editable Shapes

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This example adds a user-editable rectangle to the map.

Read the documentation.

TypeScript

// This example adds a user-editable rectangle to the map.
function initMap(): void {
  const map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    {
      center: { lat: 44.5452, lng: -78.5389 },
      zoom: 9,
    }
  );

  const bounds = {
    north: 44.599,
    south: 44.49,
    east: -78.443,
    west: -78.649,
  };

  // Define a rectangle and set its editable property to true.
  const rectangle = new google.maps.Rectangle({
    bounds: bounds,
    editable: true,
    draggable: true,
  });

  rectangle.setMap(map);

  // listen to changes
  ["bounds_changed", "dragstart", "drag", "dragend"].forEach((eventName) => {
    rectangle.addListener(eventName, () => {
      console.log({ bounds: rectangle.getBounds()?.toJSON(), eventName });
    });
  });
}

declare global {
  interface Window {
    initMap: () => void;
  }
}
window.initMap = initMap;

Note: Read the guide on using TypeScript and Google Maps. JavaScript

// This example adds a user-editable rectangle to the map.
function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    center: { lat: 44.5452, lng: -78.5389 },
    zoom: 9,
  });
  const bounds = {
    north: 44.599,
    south: 44.49,
    east: -78.443,
    west: -78.649,
  };
  // Define a rectangle and set its editable property to true.
  const rectangle = new google.maps.Rectangle({
    bounds: bounds,
    editable: true,
    draggable: true,
  });

  rectangle.setMap(map);
  // listen to changes
  ["bounds_changed", "dragstart", "drag", "dragend"].forEach((eventName) => {
    rectangle.addListener(eventName, () => {
      console.log({ bounds: rectangle.getBounds()?.toJSON(), eventName });
    });
  });
}

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>User-Editable Shapes</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>

Try Sample 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.

  git clone -b sample-user-editable-shapes https://github.com/googlemaps/js-samples.git
  cd js-samples
  npm i
  npm start

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

  git checkout sample-SAMPLE_NAME
  npm i
  npm start

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

Last updated 2025-07-02 UTC.

[[["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 2025-07-02 UTC."],[[["This example demonstrates how to create a user-editable rectangle on a Google Map."],["Users can interact with the rectangle by dragging and resizing it."],["The code provides event listeners to track changes in the rectangle's bounds during user interactions."],["The sample includes code snippets in TypeScript, JavaScript, CSS, and HTML for implementation."],["Users can try the sample using JSFiddle or Google Cloud Shell, or clone the repository for local execution."]]],["The code initializes a Google Map centered at latitude 44.5452 and longitude -78.5389 with a zoom level of 9. It defines a rectangular area using `bounds` and then creates a `google.maps.Rectangle` object with the specified bounds, making it both editable and draggable. Event listeners are added to the rectangle to log any changes in the rectangle's `bounds`, or actions like `dragstart`, `drag` or `dragend`. The rectangle is then displayed on the map.\n"]]

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