Street View Side-By-Side

async function init(): Promise<void> {
    // Request needed libraries.
    const [{ StreetViewPanorama }] = await Promise.all([
        google.maps.importLibrary('streetView'),
        google.maps.importLibrary('maps'),
    ]);

    // Get the gmp-map element and its innerMap.
    const mapElement = document.querySelector('gmp-map')!;
    const innerMap = mapElement.innerMap;

    // Get the center of the map.
    const position = mapElement.center as google.maps.LatLng;

    // Create a new StreetViewPanorama, set its position, and attach it to the map.
    const panorama = new StreetViewPanorama(document.getElementById('pano')!, {
        position,
        pov: {
            heading: 34,
            pitch: 10,
        },
    });

    /**
     * Set the StreetViewPanorama so it displays in the pano element
     * rather than taking over the map.
     * This creates a link between the map and the panorama so that
     * the map is updated when the StreetViewPanorama position changes,
     * and the StreetViewPanorama is updated when the map changes.
     */
    innerMap.setStreetView(panorama);
}

void init();
index.ts

async function init() {
    // Request needed libraries.
    const [{ StreetViewPanorama }] = await Promise.all([
        google.maps.importLibrary('streetView'),
        google.maps.importLibrary('maps'),
    ]);

    // Get the gmp-map element and its innerMap.
    const mapElement = document.querySelector('gmp-map');
    const innerMap = mapElement.innerMap;

    // Get the center of the map.
    const position = mapElement.center;

    // Create a new StreetViewPanorama, set its position, and attach it to the map.
    const panorama = new StreetViewPanorama(document.getElementById('pano'), {
        position,
        pov: {
            heading: 34,
            pitch: 10,
        },
    });

    /**
     * Set the StreetViewPanorama so it displays in the pano element
     * rather than taking over the map.
     * This creates a link between the map and the panorama so that
     * the map is updated when the StreetViewPanorama position changes,
     * and the StreetViewPanorama is updated when the map changes.
     */
    innerMap.setStreetView(panorama);
}

void init();
index.js

html,
body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    display: flex;
}

gmp-map,
#pano {
    flex: 1;
    height: 100%;
}
style.css

<html>
    <head>
        <title>Street View split-map-panes</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.ts"></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="42.345573,-71.098326"
            zoom="14"
            map-id="DEMO_MAP_ID"></gmp-map>
        <div id="pano"></div>
    </body>
</html>
index.html