This example adds a UI control that allows the user to remove the polyline from the map.
Read the documentation.
// 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);
}
declare global {
interface Window {
initMap: () => void;
}
}
window.initMap = initMap;
// 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);
}
window.initMap = initMap;
/*
* 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>
<head>
<title>Removing Polylines</title>
<link rel="stylesheet" type="text/css" href="./style.css" />
<script type="module" 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>
<!--
The `defer` attribute causes the script 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. See
https://developers.google.com/maps/documentation/javascript/load-maps-js-api
for more information.
-->
<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-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