Removing Polylines

This example adds a UI control that allows the user to remove the polyline from the map.

Read the documentation.

TypeScript

// This example adds a UI control allowing users to remove the polyline from the
// map.

let flightPath: google.maps.Polyline;
let map: google.maps.Map;

function initMap(): void {
  map = new google.maps.Map(document.getElementById("map") as HTMLElement, {
    zoom: 3,
    center: { lat: 0, lng: -180 },
    mapTypeId: "terrain",
  });

  const flightPathCoordinates: google.maps.LatLngLiteral[] = [
    { lat: 37.772, lng: -122.214 },
    { lat: 21.291, lng: -157.821 },
    { lat: -18.142, lng: 178.431 },
    { lat: -27.467, lng: 153.027 },
  ];

  flightPath = new google.maps.Polyline({
    path: flightPathCoordinates,
    strokeColor: "#FF0000",
    strokeOpacity: 1.0,
    strokeWeight: 2,
  });

  // add event listener for click event
  document.getElementById("add-line")!.addEventListener("click", addLine);
  document.getElementById("remove-line")!.addEventListener("click", removeLine);

  // initialize with line
  addLine();
}

function addLine(): void {
  flightPath.setMap(map);
}

function removeLine(): void {
  flightPath.setMap(null);
}
index.ts

JavaScript

// This example adds a UI control allowing users to remove the polyline from the
// map.
let flightPath;
let map;

function initMap() {
  map = new google.maps.Map(document.getElementById("map"), {
    zoom: 3,
    center: { lat: 0, lng: -180 },
    mapTypeId: "terrain",
  });

  const flightPathCoordinates = [
    { lat: 37.772, lng: -122.214 },
    { lat: 21.291, lng: -157.821 },
    { lat: -18.142, lng: 178.431 },
    { lat: -27.467, lng: 153.027 },
  ];

  flightPath = new google.maps.Polyline({
    path: flightPathCoordinates,
    strokeColor: "#FF0000",
    strokeOpacity: 1.0,
    strokeWeight: 2,
  });
  // add event listener for click event
  document.getElementById("add-line").addEventListener("click", addLine);
  document.getElementById("remove-line").addEventListener("click", removeLine);
  // initialize with line
  addLine();
}

function addLine() {
  flightPath.setMap(map);
}

function removeLine() {
  flightPath.setMap(null);
}

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;
}

style.css

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>Removing Polylines</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">
      <input id="remove-line" type="button" value="Remove line" />
      <input id="add-line" type="button" value="Restore line" />
    </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&v=weekly"
      async
    ></script>
  </body>
</html>
sample.html
// This example adds a UI control allowing users to remove the polyline from the // map. let flightPath; let map; function initMap() { map = new google.maps.Map(document.getElementById("map"), { zoom: 3, center: { lat: 0, lng: -180 }, mapTypeId: "terrain", }); const flightPathCoordinates = [ { lat: 37.772, lng: -122.214 }, { lat: 21.291, lng: -157.821 }, { lat: -18.142, lng: 178.431 }, { lat: -27.467, lng: 153.027 }, ]; flightPath = new google.maps.Polyline({ path: flightPathCoordinates, strokeColor: "#FF0000", strokeOpacity: 1.0, strokeWeight: 2, }); // add event listener for click event document.getElementById("add-line").addEventListener("click", addLine); document.getElementById("remove-line").addEventListener("click", removeLine); // initialize with line addLine(); } function addLine() { flightPath.setMap(map); } function removeLine() { flightPath.setMap(null); }
/* 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; }
<!DOCTYPE html> <html> <head> <title>Removing Polylines</title> <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script> <!-- jsFiddle will insert css and js --> </head> <body> <div id="floating-panel"> <input id="remove-line" type="button" value="Remove line" /> <input id="add-line" type="button" value="Restore line" /> </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=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=weekly&channel=2" 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-polyline-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