Custom Controls

This example creates a map with a "Center Map" button, which will pan the map to be centered on Chicago.

Read the documentation.

let map: google.maps.Map;

const chicago = { lat: 41.85, lng: -87.65 };

/**
 * The CenterControl adds a control to the map that recenters the map on
 * Chicago.
 * This constructor takes the control DIV as an argument.
 * @constructor
 */
function CenterControl(controlDiv: Element, map: google.maps.Map) {
  // Set CSS for the control border.
  const controlUI = document.createElement("div");

  controlUI.style.backgroundColor = "#fff";
  controlUI.style.border = "2px solid #fff";
  controlUI.style.borderRadius = "3px";
  controlUI.style.boxShadow = "0 2px 6px rgba(0,0,0,.3)";
  controlUI.style.cursor = "pointer";
  controlUI.style.marginTop = "8px";
  controlUI.style.marginBottom = "22px";
  controlUI.style.textAlign = "center";
  controlUI.title = "Click to recenter the map";
  controlDiv.appendChild(controlUI);

  // Set CSS for the control interior.
  const controlText = document.createElement("div");

  controlText.style.color = "rgb(25,25,25)";
  controlText.style.fontFamily = "Roboto,Arial,sans-serif";
  controlText.style.fontSize = "16px";
  controlText.style.lineHeight = "38px";
  controlText.style.paddingLeft = "5px";
  controlText.style.paddingRight = "5px";
  controlText.innerHTML = "Center Map";
  controlUI.appendChild(controlText);

  // Setup the click event listeners: simply set the map to Chicago.
  controlUI.addEventListener("click", () => {
    map.setCenter(chicago);
  });
}

function initMap(): void {
  map = new google.maps.Map(document.getElementById("map") as HTMLElement, {
    zoom: 12,
    center: chicago,
  });

  // Create the DIV to hold the control and call the CenterControl()
  // constructor passing in this DIV.
  const centerControlDiv = document.createElement("div");

  CenterControl(centerControlDiv, map);

  map.controls[google.maps.ControlPosition.TOP_CENTER].push(centerControlDiv);
}

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

let map;
const chicago = { lat: 41.85, lng: -87.65 };

/**
 * The CenterControl adds a control to the map that recenters the map on
 * Chicago.
 * This constructor takes the control DIV as an argument.
 * @constructor
 */
function CenterControl(controlDiv, map) {
  // Set CSS for the control border.
  const controlUI = document.createElement("div");

  controlUI.style.backgroundColor = "#fff";
  controlUI.style.border = "2px solid #fff";
  controlUI.style.borderRadius = "3px";
  controlUI.style.boxShadow = "0 2px 6px rgba(0,0,0,.3)";
  controlUI.style.cursor = "pointer";
  controlUI.style.marginTop = "8px";
  controlUI.style.marginBottom = "22px";
  controlUI.style.textAlign = "center";
  controlUI.title = "Click to recenter the map";
  controlDiv.appendChild(controlUI);

  // Set CSS for the control interior.
  const controlText = document.createElement("div");

  controlText.style.color = "rgb(25,25,25)";
  controlText.style.fontFamily = "Roboto,Arial,sans-serif";
  controlText.style.fontSize = "16px";
  controlText.style.lineHeight = "38px";
  controlText.style.paddingLeft = "5px";
  controlText.style.paddingRight = "5px";
  controlText.innerHTML = "Center Map";
  controlUI.appendChild(controlText);
  // Setup the click event listeners: simply set the map to Chicago.
  controlUI.addEventListener("click", () => {
    map.setCenter(chicago);
  });
}

function initMap() {
  map = new google.maps.Map(document.getElementById("map"), {
    zoom: 12,
    center: chicago,
  });

  // Create the DIV to hold the control and call the CenterControl()
  // constructor passing in this DIV.
  const centerControlDiv = document.createElement("div");

  CenterControl(centerControlDiv, map);
  map.controls[google.maps.ControlPosition.TOP_CENTER].push(centerControlDiv);
}

window.initMap = initMap;
index.js

/* 
 * 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>
  <head>
    <title>Custom Controls</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>

    <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 callback 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
     with https://www.npmjs.com/package/@googlemaps/js-api-loader.
    -->
    <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.

  git clone -b sample-control-custom 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