/
index.ts
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/
index.ts
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/*
* Copyright 2019 Google LLC. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
// [START maps_directions_travel_modes]
function initMap(): void {
const directionsRenderer = new google.maps.DirectionsRenderer();
const directionsService = new google.maps.DirectionsService();
const map = new google.maps.Map(
document.getElementById("map") as HTMLElement,
{
zoom: 14,
center: { lat: 37.77, lng: -122.447 },
}
);
directionsRenderer.setMap(map);
calculateAndDisplayRoute(directionsService, directionsRenderer);
(document.getElementById("mode") as HTMLInputElement).addEventListener(
"change",
() => {
calculateAndDisplayRoute(directionsService, directionsRenderer);
}
);
}
function calculateAndDisplayRoute(
directionsService: google.maps.DirectionsService,
directionsRenderer: google.maps.DirectionsRenderer
) {
const selectedMode = (document.getElementById("mode") as HTMLInputElement)
.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));
}
// [END maps_directions_travel_modes]
export { initMap };