Widget di completamento automatico dei luoghi

async function init(): Promise<void> {
    // Request needed libraries.
    const { PlaceAutocompleteElement } =
        await google.maps.importLibrary('places');
    // Create the input HTML element, and append it.
    const placeAutocomplete = new PlaceAutocompleteElement();
    document.body.appendChild(placeAutocomplete);

    // Inject HTML UI.
    const selectedPlaceTitle = document.createElement('p');
    selectedPlaceTitle.textContent = '';
    document.body.appendChild(selectedPlaceTitle);

    const selectedPlaceInfo = document.createElement('pre');
    selectedPlaceInfo.textContent = '';
    document.body.appendChild(selectedPlaceInfo);

    // Add the gmp-select listener, and display the results.
    placeAutocomplete.addEventListener(
        'gmp-select',
        async ({
            placePrediction,
        }: google.maps.places.PlacePredictionSelectEvent) => {
            const place = placePrediction.toPlace();
            await place.fetchFields({
                fields: ['displayName', 'formattedAddress', 'location'],
            });
            selectedPlaceTitle.textContent = 'Selected Place:';
            selectedPlaceInfo.textContent = JSON.stringify(
                place.toJSON(),
                /* replacer */ null,
                /* space */ 2
            );
        }
    );
}

void init();
index.ts

async function init() {
    // Request needed libraries.
    const { PlaceAutocompleteElement } =
        await google.maps.importLibrary('places');
    // Create the input HTML element, and append it.
    const placeAutocomplete = new PlaceAutocompleteElement();
    document.body.appendChild(placeAutocomplete);

    // Inject HTML UI.
    const selectedPlaceTitle = document.createElement('p');
    selectedPlaceTitle.textContent = '';
    document.body.appendChild(selectedPlaceTitle);

    const selectedPlaceInfo = document.createElement('pre');
    selectedPlaceInfo.textContent = '';
    document.body.appendChild(selectedPlaceInfo);

    // Add the gmp-select listener, and display the results.
    placeAutocomplete.addEventListener(
        'gmp-select',
        async ({ placePrediction }) => {
            const place = placePrediction.toPlace();
            await place.fetchFields({
                fields: ['displayName', 'formattedAddress', 'location'],
            });
            selectedPlaceTitle.textContent = 'Selected Place:';
            selectedPlaceInfo.textContent = JSON.stringify(
                place.toJSON(),
                /* replacer */ null,
                /* space */ 2
            );
        }
    );
}

void init();
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;
}

p {
    font-family: Roboto, sans-serif;
    font-weight: bold;
}
style.css

<html>
    <head>
        <title>Place Autocomplete element</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.js"></script>
        <script>
            // prettier-ignore
            (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: "GOOGLE_MAPS_API_KEY"
            });
        </script>
    </head>
    <body>
        <p style="font-family: roboto, sans-serif">Search for a place here:</p>
    </body>
</html>
index.html

const mapElement = document.querySelector('gmp-map')!;
const placeAutocomplete = document.querySelector('gmp-place-autocomplete')!;
let innerMap: google.maps.Map;
let marker: google.maps.marker.AdvancedMarkerElement;
let infoWindow: google.maps.InfoWindow;
async function init(): Promise<void> {
    // Request needed libraries.
    const [{ AdvancedMarkerElement }, { InfoWindow }] = await Promise.all([
        google.maps.importLibrary('marker'),
        google.maps.importLibrary('maps'),
        google.maps.importLibrary('places'),
    ]);

    // Get the inner map.
    innerMap = mapElement.innerMap;
    innerMap.setOptions({
        mapTypeControl: false,
    });

    // Use the bounds_changed event to restrict results to the current map bounds.
    innerMap.addListener('bounds_changed', () => {
        placeAutocomplete.locationRestriction = innerMap.getBounds()!;
    });

    // Create the marker and infoWindow.
    marker = new AdvancedMarkerElement({
        map: innerMap,
    });

    infoWindow = new InfoWindow();

    // Add the gmp-select listener, and display the results on the map.
    placeAutocomplete.addEventListener(
        'gmp-select',
        async ({ placePrediction }) => {
            const place = placePrediction.toPlace();
            await place.fetchFields({
                fields: [
                    'displayName',
                    'formattedAddress',
                    'location',
                    'viewport',
                ],
            });

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

            const content = document.createElement('div');
            const nameText = document.createElement('span');
            nameText.textContent = place.displayName ?? 'No name';
            content.appendChild(nameText);
            content.appendChild(document.createElement('br'));
            const addressText = document.createElement('span');
            addressText.textContent = place.formattedAddress ?? 'No address';
            content.appendChild(addressText);

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

// Helper function to create an info window.
function updateInfoWindow(
    content: string | Element | Text | null | undefined,
    center: google.maps.LatLng | google.maps.LatLngLiteral | null | undefined
) {
    infoWindow.setContent(content);
    infoWindow.setPosition(center);
    infoWindow.open({
        map: innerMap,
        anchor: marker,
        shouldFocus: false,
    });
}

void init();
index.ts

const mapElement = document.querySelector('gmp-map');
const placeAutocomplete = document.querySelector('gmp-place-autocomplete');
let innerMap;
let marker;
let infoWindow;
async function init() {
    // Request needed libraries.
    const [{ AdvancedMarkerElement }, { InfoWindow }] = await Promise.all([
        google.maps.importLibrary('marker'),
        google.maps.importLibrary('maps'),
        google.maps.importLibrary('places'),
    ]);

    // Get the inner map.
    innerMap = mapElement.innerMap;
    innerMap.setOptions({
        mapTypeControl: false,
    });

    // Use the bounds_changed event to restrict results to the current map bounds.
    innerMap.addListener('bounds_changed', () => {
        placeAutocomplete.locationRestriction = innerMap.getBounds();
    });

    // Create the marker and infoWindow.
    marker = new AdvancedMarkerElement({
        map: innerMap,
    });

    infoWindow = new InfoWindow();

    // Add the gmp-select listener, and display the results on the map.
    placeAutocomplete.addEventListener(
        'gmp-select',
        async ({ placePrediction }) => {
            const place = placePrediction.toPlace();
            await place.fetchFields({
                fields: [
                    'displayName',
                    'formattedAddress',
                    'location',
                    'viewport',
                ],
            });

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

            const content = document.createElement('div');
            const nameText = document.createElement('span');
            nameText.textContent = place.displayName ?? 'No name';
            content.appendChild(nameText);
            content.appendChild(document.createElement('br'));
            const addressText = document.createElement('span');
            addressText.textContent = place.formattedAddress ?? 'No address';
            content.appendChild(addressText);

            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: innerMap,
        anchor: marker,
        shouldFocus: false,
    });
}

void init();
index.js

/* 
 * Always set the map height explicitly to define the size of the div element
 * that contains the map. 
 */
gmp-map {
    height: 100%;
}

/* 
 * Optional: Makes the sample page fill the window. 
 */
html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}

.place-autocomplete-card {
    background-color: #fff;
    border-radius: 5px;
    box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;
    margin: 10px;
    padding: 5px;
    font-family: Roboto, sans-serif;
    font-size: small;
}

gmp-place-autocomplete {
    width: 300px;
}

#infowindow-content .title {
    font-weight: bold;
}

#map #infowindow-content {
    display: inline;
}
style.css

<html>
    <head>
        <title>Place Autocomplete map</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.js"></script>
        <script>
            // prettier-ignore
            (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: "GOOGLE_MAPS_API_KEY"
            });
        </script>
    </head>
    <body>
        <gmp-map center="40.749933,-73.98633" zoom="13" map-id="DEMO_MAP_ID">
            <div
                class="place-autocomplete-card"
                slot="control-inline-start-block-start">
                <gmp-place-autocomplete
                    placeholder="Search for a place..."></gmp-place-autocomplete>
            </div>
        </gmp-map>
    </body>
</html>
index.html