Draggable Directions

This example demonstrates the use of the DirectionsService object to fetch directions between draggable markers.

Read the documentation.

TypeScript

function initMap(): void {
  const map = new google.maps.Map(
    document.getElementById("map") as HTMLElement,
    {
      zoom: 4,
      center: { lat: -24.345, lng: 134.46 }, // Australia.
    }
  );

  const directionsService = new google.maps.DirectionsService();
  const directionsRenderer = new google.maps.DirectionsRenderer({
    draggable: true,
    map,
    panel: document.getElementById("right-panel") as HTMLElement,
  });

  directionsRenderer.addListener("directions_changed", () => {
    computeTotalDistance(directionsRenderer.getDirections()!);
  });

  displayRoute(
    "Perth, WA",
    "Sydney, NSW",
    directionsService,
    directionsRenderer
  );
}

function displayRoute(
  origin: string,
  destination: string,
  service: google.maps.DirectionsService,
  display: google.maps.DirectionsRenderer
) {
  service.route(
    {
      origin: origin,
      destination: destination,
      waypoints: [
        { location: "Adelaide, SA" },
        { location: "Broken Hill, NSW" },
      ],
      travelMode: google.maps.TravelMode.DRIVING,
      avoidTolls: true,
    },
    (
      result: google.maps.DirectionsResult | null,
      status: google.maps.DirectionsStatus
    ) => {
      if (status === "OK" && result) {
        display.setDirections(result);
      } else {
        alert("Could not display directions due to: " + status);
      }
    }
  );
}

function computeTotalDistance(result: google.maps.DirectionsResult) {
  let total = 0;
  const myroute = result.routes[0];

  if (!myroute) {
    return;
  }

  for (let i = 0; i < myroute.legs.length; i++) {
    total += myroute.legs[i]!.distance!.value;
  }
  total = total / 1000;
  (document.getElementById("total") as HTMLElement).innerHTML = total + " km";
}

JavaScript

function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    zoom: 4,
    center: { lat: -24.345, lng: 134.46 }, // Australia.
  });
  const directionsService = new google.maps.DirectionsService();
  const directionsRenderer = new google.maps.DirectionsRenderer({
    draggable: true,
    map,
    panel: document.getElementById("right-panel"),
  });
  directionsRenderer.addListener("directions_changed", () => {
    computeTotalDistance(directionsRenderer.getDirections());
  });
  displayRoute(
    "Perth, WA",
    "Sydney, NSW",
    directionsService,
    directionsRenderer
  );
}

function displayRoute(origin, destination, service, display) {
  service.route(
    {
      origin: origin,
      destination: destination,
      waypoints: [
        { location: "Adelaide, SA" },
        { location: "Broken Hill, NSW" },
      ],
      travelMode: google.maps.TravelMode.DRIVING,
      avoidTolls: true,
    },
    (result, status) => {
      if (status === "OK" && result) {
        display.setDirections(result);
      } else {
        alert("Could not display directions due to: " + status);
      }
    }
  );
}

function computeTotalDistance(result) {
  let total = 0;
  const myroute = result.routes[0];

  if (!myroute) {
    return;
  }

  for (let i = 0; i < myroute.legs.length; i++) {
    total += myroute.legs[i].distance.value;
  }
  total = total / 1000;
  document.getElementById("total").innerHTML = total + " km";
}

CSS

#right-panel {
  font-family: "Roboto", "sans-serif";
  line-height: 30px;
  padding-left: 10px;
}

#right-panel select,
#right-panel input {
  font-size: 15px;
}

#right-panel select {
  width: 100%;
}

#right-panel i {
  font-size: 12px;
}

html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

#map {
  height: 100%;
  float: left;
  width: 63%;
  height: 100%;
}

#right-panel {
  float: right;
  width: 34%;
  height: 100%;
}

.panel {
  height: 100%;
  overflow: auto;
}

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>Draggable Directions</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="map"></div>
    <div id="right-panel">
      <p>Total Distance: <span id="total"></span></p>
    </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>
function initMap() { const map = new google.maps.Map(document.getElementById("map"), { zoom: 4, center: { lat: -24.345, lng: 134.46 }, // Australia. }); const directionsService = new google.maps.DirectionsService(); const directionsRenderer = new google.maps.DirectionsRenderer({ draggable: true, map, panel: document.getElementById("right-panel"), }); directionsRenderer.addListener("directions_changed", () => { computeTotalDistance(directionsRenderer.getDirections()); }); displayRoute( "Perth, WA", "Sydney, NSW", directionsService, directionsRenderer ); } function displayRoute(origin, destination, service, display) { service.route( { origin: origin, destination: destination, waypoints: [ { location: "Adelaide, SA" }, { location: "Broken Hill, NSW" }, ], travelMode: google.maps.TravelMode.DRIVING, avoidTolls: true, }, (result, status) => { if (status === "OK" && result) { display.setDirections(result); } else { alert("Could not display directions due to: " + status); } } ); } function computeTotalDistance(result) { let total = 0; const myroute = result.routes[0]; if (!myroute) { return; } for (let i = 0; i < myroute.legs.length; i++) { total += myroute.legs[i].distance.value; } total = total / 1000; document.getElementById("total").innerHTML = total + " km"; }
#right-panel { font-family: "Roboto", "sans-serif"; line-height: 30px; padding-left: 10px; } #right-panel select, #right-panel input { font-size: 15px; } #right-panel select { width: 100%; } #right-panel i { font-size: 12px; } html, body { height: 100%; margin: 0; padding: 0; } #map { height: 100%; float: left; width: 63%; height: 100%; } #right-panel { float: right; width: 34%; height: 100%; } .panel { height: 100%; overflow: auto; }
<!DOCTYPE html> <html> <head> <title>Draggable Directions</title> <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script> <!-- jsFiddle will insert css and js --> </head> <body> <div id="map"></div> <div id="right-panel"> <p>Total Distance: <span id="total"></span></p> </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=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&libraries=&v=weekly" async ></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-directions-draggable git@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