Removing Markers

This example creates a map where each click by the user creates a marker. Click the buttons to hide or delete all of those markers.

Read the documentation.

TypeScript

// In the following example, markers appear when the user clicks on the map.
// The markers are stored in an array.
// The user can then click an option to hide, show or delete the markers.
let map: google.maps.Map;
let markers: google.maps.Marker[] = [];

function initMap(): void {
  const haightAshbury = { lat: 37.769, lng: -122.446 };

  map = new google.maps.Map(document.getElementById("map") as HTMLElement, {
    zoom: 12,
    center: haightAshbury,
    mapTypeId: "terrain",
  });

  // This event listener will call addMarker() when the map is clicked.
  map.addListener("click", (event: google.maps.MapMouseEvent) => {
    addMarker(event.latLng!);
  });

  // add event listeners for the buttons
  document
    .getElementById("show-markers")!
    .addEventListener("click", showMarkers);
  document
    .getElementById("hide-markers")!
    .addEventListener("click", hideMarkers);
  document
    .getElementById("delete-markers")!
    .addEventListener("click", deleteMarkers);

  // Adds a marker at the center of the map.
  addMarker(haightAshbury);
}

// Adds a marker to the map and push to the array.
function addMarker(position: google.maps.LatLng | google.maps.LatLngLiteral) {
  const marker = new google.maps.Marker({
    position,
    map,
  });

  markers.push(marker);
}

// Sets the map on all markers in the array.
function setMapOnAll(map: google.maps.Map | null) {
  for (let i = 0; i < markers.length; i++) {
    markers[i].setMap(map);
  }
}

// Removes the markers from the map, but keeps them in the array.
function hideMarkers(): void {
  setMapOnAll(null);
}

// Shows any markers currently in the array.
function showMarkers(): void {
  setMapOnAll(map);
}

// Deletes all markers in the array by removing references to them.
function deleteMarkers(): void {
  hideMarkers();
  markers = [];
}

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

JavaScript

// In the following example, markers appear when the user clicks on the map.
// The markers are stored in an array.
// The user can then click an option to hide, show or delete the markers.
let map;
let markers = [];

function initMap() {
  const haightAshbury = { lat: 37.769, lng: -122.446 };

  map = new google.maps.Map(document.getElementById("map"), {
    zoom: 12,
    center: haightAshbury,
    mapTypeId: "terrain",
  });
  // This event listener will call addMarker() when the map is clicked.
  map.addListener("click", (event) => {
    addMarker(event.latLng);
  });
  // add event listeners for the buttons
  document
    .getElementById("show-markers")
    .addEventListener("click", showMarkers);
  document
    .getElementById("hide-markers")
    .addEventListener("click", hideMarkers);
  document
    .getElementById("delete-markers")
    .addEventListener("click", deleteMarkers);
  // Adds a marker at the center of the map.
  addMarker(haightAshbury);
}

// Adds a marker to the map and push to the array.
function addMarker(position) {
  const marker = new google.maps.Marker({
    position,
    map,
  });

  markers.push(marker);
}

// Sets the map on all markers in the array.
function setMapOnAll(map) {
  for (let i = 0; i < markers.length; i++) {
    markers[i].setMap(map);
  }
}

// Removes the markers from the map, but keeps them in the array.
function hideMarkers() {
  setMapOnAll(null);
}

// Shows any markers currently in the array.
function showMarkers() {
  setMapOnAll(map);
}

// Deletes all markers in the array by removing references to them.
function deleteMarkers() {
  hideMarkers();
  markers = [];
}

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;
}

#floating-panel {
  position: absolute;
  top: 10px;
  left: 25%;
  z-index: 5;
  background-color: #fff;
  padding: 5px;
  border: 1px solid #999;
  text-align: center;
  font-family: "Roboto", "sans-serif";
  line-height: 30px;
  padding-left: 10px;
}

HTML

<html>
  <head>
    <title>Removing Markers</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="floating-panel">
      <input id="hide-markers" type="button" value="Hide Markers" />
      <input id="show-markers" type="button" value="Show Markers" />
      <input id="delete-markers" type="button" value="Delete Markers" />
    </div>
    <div id="map"></div>
    <p>Click on the map to add markers.</p>

    <!-- 
     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>

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-marker-remove 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