Marker Animations With setTimeout()

This example uses window.setTimeout() to place markers on the map consecutively rather than all at once when a Drop Markers button is clicked.

Read the documentation.

TypeScript

// If you're adding a number of markers, you may want to drop them on the map
// consecutively rather than all at once. This example shows how to use
// window.setTimeout() to space your markers' animation.

const neighborhoods: google.maps.LatLngLiteral[] = [
  { lat: 52.511, lng: 13.447 },
  { lat: 52.549, lng: 13.422 },
  { lat: 52.497, lng: 13.396 },
  { lat: 52.517, lng: 13.394 },
];

let markers: google.maps.Marker[] = [];
let map: google.maps.Map;

function initMap(): void {
  map = new google.maps.Map(document.getElementById("map") as HTMLElement, {
    zoom: 12,
    center: { lat: 52.52, lng: 13.41 },
  });
}

function drop() {
  clearMarkers();

  for (let i = 0; i < neighborhoods.length; i++) {
    addMarkerWithTimeout(neighborhoods[i], i * 200);
  }
}

function addMarkerWithTimeout(
  position: google.maps.LatLngLiteral,
  timeout: number
) {
  window.setTimeout(() => {
    markers.push(
      new google.maps.Marker({
        position: position,
        map,
        animation: google.maps.Animation.DROP,
      })
    );
  }, timeout);
}

function clearMarkers() {
  for (let i = 0; i < markers.length; i++) {
    markers[i].setMap(null);
  }
  markers = [];
}index.ts

JavaScript

// If you're adding a number of markers, you may want to drop them on the map
// consecutively rather than all at once. This example shows how to use
// window.setTimeout() to space your markers' animation.
const neighborhoods = [
  { lat: 52.511, lng: 13.447 },
  { lat: 52.549, lng: 13.422 },
  { lat: 52.497, lng: 13.396 },
  { lat: 52.517, lng: 13.394 },
];
let markers = [];
let map;

function initMap() {
  map = new google.maps.Map(document.getElementById("map"), {
    zoom: 12,
    center: { lat: 52.52, lng: 13.41 },
  });
}

function drop() {
  clearMarkers();

  for (let i = 0; i < neighborhoods.length; i++) {
    addMarkerWithTimeout(neighborhoods[i], i * 200);
  }
}

function addMarkerWithTimeout(position, timeout) {
  window.setTimeout(() => {
    markers.push(
      new google.maps.Marker({
        position: position,
        map,
        animation: google.maps.Animation.DROP,
      })
    );
  }, timeout);
}

function clearMarkers() {
  for (let i = 0; i < markers.length; i++) {
    markers[i].setMap(null);
  }
  markers = [];
}
index.js

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;
}

#floating-panel {
  margin-left: -52px;
}
style.css

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>Marker Animations With setTimeout()</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script src="./index.js"></script>
  </head>
  <body>
    <div id="floating-panel">
      <button id="drop" onclick="drop()">Drop Markers</button>
    </div>
    <div id="map"></div>

    <!-- Async script executes immediately and must be after any DOM elements used in callback. -->
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
      async
    ></script>
  </body>
</html>sample.html

All

<!DOCTYPE html>
<html>
  <head>
    <title>Marker Animations With setTimeout()</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <style type="text/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;
      }

      #floating-panel {
        margin-left: -52px;
      }
    </style>
    <script>
      // If you're adding a number of markers, you may want to drop them on the map
      // consecutively rather than all at once. This example shows how to use
      // window.setTimeout() to space your markers' animation.
      const neighborhoods = [
        { lat: 52.511, lng: 13.447 },
        { lat: 52.549, lng: 13.422 },
        { lat: 52.497, lng: 13.396 },
        { lat: 52.517, lng: 13.394 },
      ];
      let markers = [];
      let map;

      function initMap() {
        map = new google.maps.Map(document.getElementById("map"), {
          zoom: 12,
          center: { lat: 52.52, lng: 13.41 },
        });
      }

      function drop() {
        clearMarkers();

        for (let i = 0; i < neighborhoods.length; i++) {
          addMarkerWithTimeout(neighborhoods[i], i * 200);
        }
      }

      function addMarkerWithTimeout(position, timeout) {
        window.setTimeout(() => {
          markers.push(
            new google.maps.Marker({
              position: position,
              map,
              animation: google.maps.Animation.DROP,
            })
          );
        }, timeout);
      }

      function clearMarkers() {
        for (let i = 0; i < markers.length; i++) {
          markers[i].setMap(null);
        }
        markers = [];
      }
    </script>
  </head>
  <body>
    <div id="floating-panel">
      <button id="drop" onclick="drop()">Drop Markers</button>
    </div>
    <div id="map"></div>

    <!-- Async script executes immediately and must be after any DOM elements used in callback. -->
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
      async
    ></script>
  </body>
</html>
inline.html

// If you're adding a number of markers, you may want to drop them on the map // consecutively rather than all at once. This example shows how to use // window.setTimeout() to space your markers' animation. const neighborhoods = [ { lat: 52.511, lng: 13.447 }, { lat: 52.549, lng: 13.422 }, { lat: 52.497, lng: 13.396 }, { lat: 52.517, lng: 13.394 }, ]; let markers = []; let map; function initMap() { map = new google.maps.Map(document.getElementById("map"), { zoom: 12, center: { lat: 52.52, lng: 13.41 }, }); } function drop() { clearMarkers(); for (let i = 0; i < neighborhoods.length; i++) { addMarkerWithTimeout(neighborhoods[i], i * 200); } } function addMarkerWithTimeout(position, timeout) { window.setTimeout(() => { markers.push( new google.maps.Marker({ position: position, map, animation: google.maps.Animation.DROP, }) ); }, timeout); } function clearMarkers() { for (let i = 0; i < markers.length; i++) { markers[i].setMap(null); } markers = []; }

/* 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; } #floating-panel { margin-left: -52px; }

<!DOCTYPE html> <html> <head> <title>Marker Animations With setTimeout()</title> <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>  </head> <body> <div id="floating-panel"> <button id="drop" onclick="drop()">Drop Markers</button> </div> <div id="map"></div>  <script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyBIwzALxUPNbatRBj3Xi1Uhp0fFzwWNBkE&callback=initMap&libraries=&v=weekly" async ></script> </body> </html>

Create a starter application from sample

A skeleton starter application using TypeScript, Webpack, and Babel can be generated from this sample using one of the methods below.

Run Locally

Node.js is required to run this sample locally. Follow these instructions to install Node.js and NPM.

npx @googlemaps/js-samples init marker-animations-iteration DESTINATION_FOLDER

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