Read the documentation.
// This example adds a UI control allowing users to remove the polyline from the
// map.
var flightPath;
var map;
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
zoom: 3,
center: {lat: 0, lng: -180},
mapTypeId: 'terrain'
});
var 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
});
addLine();
}
function addLine() {
flightPath.setMap(map);
}
function removeLine() {
flightPath.setMap(null);
}
<div id="floating-panel"> <input onclick="removeLine();" type=button value="Remove line"> <input onclick="addLine();" type=button value="Restore line"> </div> <div id="map"></div>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 425px;
}
/* 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;
}
<!-- Replace the value of the key parameter with your own API key. --> <script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap"> </script>
Try it yourself
You can experiment with this code in JSFiddle by clicking the <> icon in the
top-right corner of the code window.
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Removing Polylines</title>
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 425px;
}
/* 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>
</head>
<body>
<div id="floating-panel">
<input onclick="removeLine();" type=button value="Remove line">
<input onclick="addLine();" type=button value="Restore line">
</div>
<div id="map"></div>
<script>
// This example adds a UI control allowing users to remove the polyline from the
// map.
var flightPath;
var map;
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
zoom: 3,
center: {lat: 0, lng: -180},
mapTypeId: 'terrain'
});
var 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
});
addLine();
}
function addLine() {
flightPath.setMap(map);
}
function removeLine() {
flightPath.setMap(null);
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
</script>
</body>
</html>
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