迁移到新版地点自动补全

function init() {
  const placeInfo = document.getElementById("prediction");
  const service = new google.maps.places.AutocompleteService();
  const placesService = new google.maps.places.PlacesService(placeInfo);
  var sessionToken = new google.maps.places.AutocompleteSessionToken();

  // Define request options.
  let request = {
    input: "par",
    sessionToken: sessionToken,
    bounds: {
      west: -122.44,
      north: 37.8,
      east: -122.39,
      south: 37.78,
    },
  }

  // Display the query string.
  const title = document.getElementById("title");
  title.appendChild(
    document.createTextNode('Place predictions for "' + request.input + '":'),
  );

  // Perform the query and display the results.
  const displaySuggestions = function (predictions, status) {
    // Check the status of the Places Service.
    if (status != google.maps.places.PlacesServiceStatus.OK || !predictions) {
      alert(status);
      return;
    }

    predictions.forEach((prediction) => {
      const li = document.createElement("li");
      li.appendChild(document.createTextNode(prediction.description));
      document.getElementById("results").appendChild(li);
    });

    const placeRequest = {
      placeId: predictions[0].place_id,
      fields: ["name", "formatted_address"],
    };

    placesService.getDetails(placeRequest, (place, status) => {
      if (status == google.maps.places.PlacesServiceStatus.OK && place) {
        placeInfo.textContent = `
          First predicted place: ${place.name} at ${place.formatted_address}`
      }
    });

  };

  // Show the results of the query.
  service.getPlacePredictions(request, displaySuggestions);
}

async function init() {
  let sessionToken = new google.maps.places.AutocompleteSessionToken();

  // Define request options.
  let request = {
    input: "par",
    sessionToken: sessionToken,
    locationBias: {
      west: -122.44,
      north: 37.8,
      east: -122.39,
      south: 37.78,
    },
  };

  // Display the query string.
  const title = document.getElementById("title");
  title.appendChild(
    document.createTextNode('Place predictions for "' + request.input + '":'),
  );

  // Perform the query and display the results.
  const { suggestions } =
    await google.maps.places.AutocompleteSuggestion.fetchAutocompleteSuggestions(request);

  const resultsElement = document.getElementById("results");

  for (let suggestion of suggestions) {
    const placePrediction = suggestion.placePrediction;
    const listItem = document.createElement("li");

    listItem.appendChild(
      document.createTextNode(placePrediction.text.text),
    );

    resultsElement.appendChild(listItem);
  }

  // Show the first predicted place.
  let place = suggestions[0].placePrediction.toPlace();

  await place.fetchFields({
    fields: ["displayName", "formattedAddress"],
  });

  const placeInfo = document.getElementById("prediction");

  placeInfo.textContent = `
    First predicted place: ${place.displayName} at ${place.formattedAddress}`
}

function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    center: { lat: 40.749933, lng: -73.98633 },
    zoom: 13,
    mapTypeControl: false,
  });
  const card = document.getElementById("pac-card");
  const input = document.getElementById("pac-input");
  const options = {
    fields: ["formatted_address", "geometry", "name"],
    strictBounds: false,
  };

  map.controls[google.maps.ControlPosition.TOP_LEFT].push(card);

  const autocomplete = new google.maps.places.Autocomplete(input, options);

  // Bind the map's bounds (viewport) property to the autocomplete object,
  // so that the autocomplete requests use the current map bounds for the
  // bounds option in the request.
  autocomplete.bindTo("bounds", map);

  const infowindow = new google.maps.InfoWindow();
  const infowindowContent = document.getElementById("infowindow-content");

  infowindow.setContent(infowindowContent);

  const marker = new google.maps.Marker({
    map,
    anchorPoint: new google.maps.Point(0, -29),
  });

  autocomplete.addListener("place_changed", () => {
    infowindow.close();
    marker.setVisible(false);

    const place = autocomplete.getPlace();

    if (!place.geometry || !place.geometry.location) {
      // User entered the name of a Place that was not suggested and
      // pressed the Enter key, or the Place Details request failed.
      window.alert("No details available for input: '" + place.name + "'");
      return;
    }

    // If the place has a geometry, then present it on a map.
    if (place.geometry.viewport) {
      map.fitBounds(place.geometry.viewport);
    } else {
      map.setCenter(place.geometry.location);
      map.setZoom(17);
    }

    marker.setPosition(place.geometry.location);
    marker.setVisible(true);
    infowindowContent.children["place-name"].textContent = place.name;
    infowindowContent.children["place-address"].textContent =
      place.formatted_address;
    infowindow.open(map, marker);
  });
}

let map;
let marker;
let infoWindow;

async function initMap() {
  // Request needed libraries.
  const [{ Map }, { AdvancedMarkerElement }] = await Promise.all([
    google.maps.importLibrary("marker"),
    google.maps.importLibrary("places"),
  ]);

  // Initialize the map.
  map = new google.maps.Map(document.getElementById("map"), {
    center: { lat: 40.749933, lng: -73.98633 },
    zoom: 13,
    mapId: "4504f8b37365c3d0",
    mapTypeControl: false,
  });

  const placeAutocomplete =
    new google.maps.places.PlaceAutocompleteElement({
      locationRestriction: map.getBounds(),
    });

  placeAutocomplete.id = "place-autocomplete-input";
  const card = document.getElementById("place-autocomplete-card");

  card.appendChild(placeAutocomplete);
  map.controls[google.maps.ControlPosition.TOP_LEFT].push(card);

  // Create the marker and infowindow.
  marker = new google.maps.marker.AdvancedMarkerElement({
    map,
  });
  infoWindow = new google.maps.InfoWindow({});

  // Add the gmp-select listener, and display the results on the map.
  placeAutocomplete.addEventListener("gmp-select", async ( place ) => {
    const place = event.placePrediction.toPlace();
    await place.fetchFields({
      fields: ["displayName", "formattedAddress", "location"],
    });
    // If the place has a geometry, then present it on a map.
    if (place.viewport) {
      map.fitBounds(place.viewport);
    } else {
      map.setCenter(place.location);
      map.setZoom(17);
    }

    let content =
      '<div id="infowindow-content">' +
      '<span id="place-displayname" class="title">' +
      place.displayName +
      '</span><br />' +
      '<span id="place-address">' +
      place.formattedAddress +
      '</span>' +
      '</div>';

    updateInfoWindow(content, place.location);
    marker.position = place.location;
  });
}

// Helper function to create an info window.
function updateInfoWindow(content, center) {
  infoWindow.setContent(content);
  infoWindow.setPosition(center);
  infoWindow.open({
    map,
    anchor: marker,
    shouldFocus: false,
  });
}