查询路线

// Initialize and add the map.
let map;
let mapPolylines: google.maps.Polyline[] = [];
const center = { lat: 37.447646, lng: -122.113878 }; // Palo Alto, CA

// Initialize and add the map.
async function initMap(): Promise<void> {
  //  Request the needed libraries.
  const [{Map}, {Place}, {Route}] = await Promise.all([
    google.maps.importLibrary('maps') as Promise<google.maps.MapsLibrary>,
    google.maps.importLibrary('places') as Promise<google.maps.PlacesLibrary>,
    //@ts-ignore
    google.maps.importLibrary('routes') as Promise<google.maps.Routes>
  ]);

  map = new Map(document.getElementById("map") as HTMLElement, {
    zoom: 12,
    center: center,
    mapTypeControl: false,
    mapId: 'DEMO_MAP_ID',
  });

  // Use address strings in a directions request.
  const requestWithAddressStrings = {
    origin: '1600 Amphitheatre Parkway, Mountain View, CA',
    destination: '345 Spear Street, San Francisco, CA',
    fields: ['path'],
  };

  // Use Place IDs in a directions request.
  const originPlaceInstance = new Place({
    id: 'ChIJiQHsW0m3j4ARm69rRkrUF3w', // Mountain View, CA
  });

  const destinationPlaceInstance = new Place({
    id: 'ChIJIQBpAG2ahYAR_6128GcTUEo', // San Francisco, CA
  });

  const requestWithPlaceIds = {
    origin: originPlaceInstance,
    destination: destinationPlaceInstance,
    fields: ['path'], // Request fields needed to draw polylines.
  }; 

  // Use lat/lng in a directions request.
  // Mountain View, CA
  const originLatLng = {lat: 37.422000, lng: -122.084058};
  // San Francisco, CA
  const destinationLatLng = {lat: 37.774929, lng: -122.419415};

  // Define a computeRoutes request.
  const requestWithLatLngs = {
    origin: originLatLng,
    destination: destinationLatLng,
    fields: ['path'],
  };

  // Use Plus Codes in a directions request.
  const requestWithPlusCodes = {
    origin: '849VCWC8+R9', // Mountain View, CA
    destination: 'CRHJ+C3 Stanford, CA 94305, USA', // Stanford, CA
    fields: ['path'],
  };

  // Define a routes request.
  const request = {
    origin: 'Mountain View, CA',
    destination: 'San Francisco, CA',
    travelMode: 'DRIVING',
    fields: ['path'], // Request fields needed to draw polylines.
  };

  // Call computeRoutes to get the directions.
  const {routes, fallbackInfo, geocodingResults} = await Route.computeRoutes(request);

  // Use createPolylines to create polylines for the route.
  mapPolylines = routes[0].createPolylines();
  // Add polylines to the map.
  mapPolylines.forEach((polyline) => polyline.setMap(map));

  // Create markers to start and end points.
  const markers = await routes[0].createWaypointAdvancedMarkers();
  // Add markers to the map
  markers.forEach((marker) => marker.setMap(map));

  // Display the raw JSON for the result in the console.
  console.log(`Response:\n ${JSON.stringify(routes, null, 2)}`);

  // Fit the map to the path.
  fitMapToPath(routes[0].path!);
}

// Helper function to fit the map to the path.
async function fitMapToPath(path) {
  const { LatLngBounds } = await google.maps.importLibrary('core') as google.maps.CoreLibrary;
  const bounds = new LatLngBounds();
  path.forEach((point) => {
    bounds.extend(point);
  });
  map.fitBounds(bounds);
}

initMap();
index.ts

// Initialize and add the map.
let map;
let mapPolylines = [];
const center = { lat: 37.447646, lng: -122.113878 }; // Palo Alto, CA
// Initialize and add the map.
async function initMap() {
    //  Request the needed libraries.
    const [{ Map }, { Place }, { Route }] = await Promise.all([
        google.maps.importLibrary('maps'),
        google.maps.importLibrary('places'),
        //@ts-ignore
        google.maps.importLibrary('routes')
    ]);
    map = new Map(document.getElementById("map"), {
        zoom: 12,
        center: center,
        mapTypeControl: false,
        mapId: 'DEMO_MAP_ID',
    });
    // Use address strings in a directions request.
    const requestWithAddressStrings = {
        origin: '1600 Amphitheatre Parkway, Mountain View, CA',
        destination: '345 Spear Street, San Francisco, CA',
        fields: ['path'],
    };
    // Use Place IDs in a directions request.
    const originPlaceInstance = new Place({
        id: 'ChIJiQHsW0m3j4ARm69rRkrUF3w', // Mountain View, CA
    });
    const destinationPlaceInstance = new Place({
        id: 'ChIJIQBpAG2ahYAR_6128GcTUEo', // San Francisco, CA
    });
    const requestWithPlaceIds = {
        origin: originPlaceInstance,
        destination: destinationPlaceInstance,
        fields: ['path'], // Request fields needed to draw polylines.
    };
    // Use lat/lng in a directions request.
    // Mountain View, CA
    const originLatLng = { lat: 37.422000, lng: -122.084058 };
    // San Francisco, CA
    const destinationLatLng = { lat: 37.774929, lng: -122.419415 };
    // Define a computeRoutes request.
    const requestWithLatLngs = {
        origin: originLatLng,
        destination: destinationLatLng,
        fields: ['path'],
    };
    // Use Plus Codes in a directions request.
    const requestWithPlusCodes = {
        origin: '849VCWC8+R9', // Mountain View, CA
        destination: 'CRHJ+C3 Stanford, CA 94305, USA', // Stanford, CA
        fields: ['path'],
    };
    // Define a routes request.
    const request = {
        origin: 'Mountain View, CA',
        destination: 'San Francisco, CA',
        travelMode: 'DRIVING',
        fields: ['path'], // Request fields needed to draw polylines.
    };
    // Call computeRoutes to get the directions.
    const { routes, fallbackInfo, geocodingResults } = await Route.computeRoutes(request);
    // Use createPolylines to create polylines for the route.
    mapPolylines = routes[0].createPolylines();
    // Add polylines to the map.
    mapPolylines.forEach((polyline) => polyline.setMap(map));
    // Create markers to start and end points.
    const markers = await routes[0].createWaypointAdvancedMarkers();
    // Add markers to the map
    markers.forEach((marker) => marker.setMap(map));
    // Display the raw JSON for the result in the console.
    console.log(`Response:\n ${JSON.stringify(routes, null, 2)}`);
    // Fit the map to the path.
    fitMapToPath(routes[0].path);
}
// Helper function to fit the map to the path.
async function fitMapToPath(path) {
    const { LatLngBounds } = await google.maps.importLibrary('core');
    const bounds = new LatLngBounds();
    path.forEach((point) => {
        bounds.extend(point);
    });
    map.fitBounds(bounds);
}
initMap();
index.js

/*
 * 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.css

<html>
  <head>
    <title>Get directions</title>

    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script type="module" src="./index.js"></script>
  </head>
  <body>
    <div id="map"></div>
    <!-- prettier-ignore -->
    <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
        ({key: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "beta"});</script>
  </body>
</html>
index.html