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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_directions_travel_modes]
function initMap() {
const directionsRenderer = new google.maps.DirectionsRenderer();
const directionsService = new google.maps.DirectionsService();
const map = new google.maps.Map(document.getElementById("map"), {
zoom: 14,
center: { lat: 37.77, lng: -122.447 },
});
directionsRenderer.setMap(map);
calculateAndDisplayRoute(directionsService, directionsRenderer);
document.getElementById("mode").addEventListener("change", () => {
calculateAndDisplayRoute(directionsService, directionsRenderer);
});
}
function calculateAndDisplayRoute(directionsService, directionsRenderer) {
const selectedMode = document.getElementById("mode").value;
directionsService
.route({
origin: { lat: 37.77, lng: -122.447 }, // Haight.
destination: { lat: 37.768, lng: -122.511 }, // Ocean Beach.
// Note that Javascript allows us to access the constant
// using square brackets and a string value as its
// "property."
travelMode: google.maps.TravelMode[selectedMode],
})
.then((response) => {
directionsRenderer.setDirections(response);
})
.catch((e) => window.alert("Directions request failed due to " + status));
}
window.initMap = initMap;
// [END maps_directions_travel_modes]