index.js

/**
 * @license
 * Copyright 2019 Google LLC. All Rights Reserved.
 * SPDX-License-Identifier: Apache-2.0
 */
// [START maps_streetview_overlays]
let panorama;

function initMap() {
  const astorPlace = { lat: 40.729884, lng: -73.990988 };
  // Set up the map
  const map = new google.maps.Map(document.getElementById("map"), {
    center: astorPlace,
    zoom: 18,
    streetViewControl: false,
  });

  document.getElementById("toggle").addEventListener("click", toggleStreetView);

  const cafeIcon = document.createElement("img");

  cafeIcon.src =
    "https://developers.google.com/maps/documentation/javascript/examples/full/images/cafe_icon.svg";

  const dollarIcon = document.createElement("img");

  dollarIcon.src =
    "https://developers.google.com/maps/documentation/javascript/examples/full/images/bank_icon.svg";

  const busIcon = document.createElement("img");

  busIcon.src =
    "https://developers.google.com/maps/documentation/javascript/examples/full/images/bus_icon.svg";

  // Set up the markers on the map
  const cafeMarker = new google.maps.Marker({
    position: { lat: 40.730031, lng: -73.991428 },
    map,
    title: "Cafe",
    icon: cafeIcon.src,
  });
  const bankMarker = new google.maps.Marker({
    position: { lat: 40.729681, lng: -73.991138 },
    map,
    title: "Bank",
    icon: dollarIcon.src,
  });
  const busMarker = new google.maps.Marker({
    position: { lat: 40.729559, lng: -73.990741 },
    map,
    title: "Bus Stop",
    icon: busIcon.src,
  });

  // We get the map's default panorama and set up some defaults.
  // Note that we don't yet set it visible.
  panorama = map.getStreetView(); // TODO fix type
  panorama.setPosition(astorPlace);
  panorama.setPov(
    /** @type {google.maps.StreetViewPov} */ {
      heading: 265,
      pitch: 0,
    },
  );
}

function toggleStreetView() {
  const toggle = panorama.getVisible();

  if (toggle == false) {
    panorama.setVisible(true);
  } else {
    panorama.setVisible(false);
  }
}

window.initMap = initMap;
// [END maps_streetview_overlays]