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inline.html
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<!DOCTYPE html>
<html>
<head>
<title>Complex Polylines</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;
}
</style>
<script>
// This example creates an interactive map which constructs a polyline based on
// user clicks. Note that the polyline only appears once its path property
// contains two LatLng coordinates.
let poly;
let map;
function initMap() {
map = new google.maps.Map(document.getElementById("map"), {
zoom: 7,
center: { lat: 41.879, lng: -87.624 },
});
poly = new google.maps.Polyline({
strokeColor: "#000000",
strokeOpacity: 1.0,
strokeWeight: 3,
});
poly.setMap(map);
// Add a listener for the click event
map.addListener("click", addLatLng);
}
// Handles click events on a map, and adds a new point to the Polyline.
function addLatLng(event) {
const path = poly.getPath();
// Because path is an MVCArray, we can simply append a new coordinate
// and it will automatically appear.
path.push(event.latLng);
// Add a new marker at the new plotted point on the polyline.
new google.maps.Marker({
position: event.latLng,
title: "#" + path.getLength(),
map: map,
});
}
</script>
</head>
<body>
<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>