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index.js
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index.js
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/**
* @license
* Copyright 2019 Google LLC. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
// [START maps_geometry_encodings]
// This example requires the Geometry library. Include the libraries=geometry
// parameter when you first load the API. For example:
// <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=geometry">
function initMap() {
const map = new google.maps.Map(document.getElementById("map"), {
zoom: 14,
center: { lat: 34.366, lng: -89.519 },
});
const poly = new google.maps.Polyline({
strokeColor: "#000000",
strokeOpacity: 1,
strokeWeight: 3,
map: map,
});
// Add a listener for the click event
google.maps.event.addListener(map, "click", (event) => {
addLatLngToPoly(event.latLng, poly);
});
}
/**
* Handles click events on a map, and adds a new point to the Polyline.
* Updates the encoding text area with the path's encoded values.
*/
function addLatLngToPoly(latLng, poly) {
const path = poly.getPath();
// Because path is an MVCArray, we can simply append a new coordinate
// and it will automatically appear
path.push(latLng);
// Update the text field to display the polyline encodings
const encodeString = google.maps.geometry.encoding.encodePath(path);
if (encodeString) {
document.getElementById("encoded-polyline").value = encodeString;
}
}
window.initMap = initMap;
// [END maps_geometry_encodings]