Set collision behavior for a marker

let map: google.maps.Map;

// Initialize and add the map
async function initMap(): Promise<void> {
  // Request needed libraries.
  const { Map } = await google.maps.importLibrary("maps") as google.maps.MapsLibrary;
  const { AdvancedMarkerElement } = await google.maps.importLibrary("marker") as google.maps.MarkerLibrary;

  let markers: google.maps.marker.AdvancedMarkerElement[] = [];

  let collisionBehavior = google.maps.CollisionBehavior.REQUIRED;

  map = new Map(
    document.getElementById("map") as HTMLElement,
    {
      mapId: "6ff586e93e18149f",
      center: { lat: 47.609414458375674, lng: -122.33897030353548 },
      zoom: 17,
    } as google.maps.MapOptions
  );

  // @ts-ignore
  const select = new mdc.select.MDCSelect(
    document.querySelector(".mdc-select") as HTMLElement
  );


  select.listen("MDCSelect:change", () => {
    collisionBehavior = select.value;
    markers.forEach((marker) => {
      marker.collisionBehavior = collisionBehavior;
    });
  });

  select.value = collisionBehavior;

  // Create some markers on the map
  let locations = [
    [-122.3402, 47.6093],
    [-122.3402, 47.6094],
    [-122.3403, 47.6094],
    [-122.3384, 47.6098],
    [-122.3389, 47.6095],
    [-122.3396, 47.6095],
    [-122.3379, 47.6097],
    [-122.3378, 47.6097],
    [-122.3396, 47.6091],
    [-122.3383, 47.6089],
    [-122.3379, 47.6093],
    [-122.3381, 47.6095],
    [-122.3378, 47.6095],
  ];

  locations.forEach(([lng, lat]: number[]) => {
    const advancedMarker = new AdvancedMarkerElement({
      position: new google.maps.LatLng({ lat, lng }),
      map,
      collisionBehavior: collisionBehavior,
    });
    markers.push(advancedMarker);
  });
}

initMap();
index.ts

let map;

// Initialize and add the map
async function initMap() {
  // Request needed libraries.
  const { Map } = await google.maps.importLibrary("maps");
  const { AdvancedMarkerElement } = await google.maps.importLibrary("marker");
  let markers = [];
  let collisionBehavior = google.maps.CollisionBehavior.REQUIRED;

  map = new Map(document.getElementById("map"), {
    mapId: "6ff586e93e18149f",
    center: { lat: 47.609414458375674, lng: -122.33897030353548 },
    zoom: 17,
  });

  // @ts-ignore
  const select = new mdc.select.MDCSelect(
    document.querySelector(".mdc-select"),
  );

  select.listen("MDCSelect:change", () => {
    collisionBehavior = select.value;
    markers.forEach((marker) => {
      marker.collisionBehavior = collisionBehavior;
    });
  });
  select.value = collisionBehavior;

  // Create some markers on the map
  let locations = [
    [-122.3402, 47.6093],
    [-122.3402, 47.6094],
    [-122.3403, 47.6094],
    [-122.3384, 47.6098],
    [-122.3389, 47.6095],
    [-122.3396, 47.6095],
    [-122.3379, 47.6097],
    [-122.3378, 47.6097],
    [-122.3396, 47.6091],
    [-122.3383, 47.6089],
    [-122.3379, 47.6093],
    [-122.3381, 47.6095],
    [-122.3378, 47.6095],
  ];

  locations.forEach(([lng, lat]) => {
    const advancedMarker = new AdvancedMarkerElement({
      position: new google.maps.LatLng({ lat, lng }),
      map,
      collisionBehavior: collisionBehavior,
    });

    markers.push(advancedMarker);
  });
}

initMap();
index.js

:root {
  --mdc-theme-primary: #1a73e8;
  --mdc-theme-secondary: #rgb(225, 245, 254);
  --mdc-theme-on-primary: #fff;
  --mdc-theme-on-secondary: rgb(1, 87, 155);
}

.mdc-text-field--focused:not(.mdc-text-field--disabled) .mdc-floating-label {
  color: var(--mdc-theme-primary);
}

.mdc-select--focused .mdc-select__dropdown-icon {
  background: url(data:image/svg+xml,%3Csvg%20width%3D%2210px%22%20height%3D%225px%22%20viewBox%3D%227%2010%2010%205%22%20version%3D%221.1%22%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20xmlns%3Axlink%3D%22http%3A%2F%2Fwww.w3.org%2F1999%2Fxlink%22%3E%0A%20%20%20%20%3Cpolygon%20id%3D%22Shape%22%20stroke%3D%22none%22%20fill%3D%22%23000%22%20fill-rule%3D%22evenodd%22%20opacity%3D%220.54%22%20points%3D%227%2010%2012%2015%2017%2010%22%3E%3C%2Fpolygon%3E%0A%3C%2Fsvg%3E) no-repeat center;
}

.mdc-select:not(.mdc-select--disabled).mdc-select--focused .mdc-floating-label {
  color: var(--mdc-theme-primary);
}

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

#container {
  height: 100%;
  display: flex;
}

#sidebar {
  flex-basis: 15rem;
  flex-grow: 1;
  padding: 1rem;
  max-width: 30rem;
  height: 100%;
  box-sizing: border-box;
  overflow: auto;
}

#map {
  flex-basis: 0;
  flex-grow: 4;
  height: 100%;
}

.mdc-select,
.mdc-select__anchor,
.mdc-select__menu {
  width: 100%;
}
style.css

<html>
  <head>
    <title>Advanced Marker Collision Management</title>

    <link
      href="https://unpkg.com/material-components-web@6.0.0/dist/material-components-web.css"
      rel="stylesheet"
    />
    <script src="https://unpkg.com/material-components-web@6.0.0/dist/material-components-web.min.js"></script>
    <link
      rel="stylesheet"
      href="https://fonts.googleapis.com/icon?family=Material+Icons"
    />

    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script type="module" src="./index.js"></script>
  </head>
  <body>
    <div id="container">
      <div id="map"></div>
      <div id="sidebar">
        <div class="mdc-select mdc-select--outlined">
          <div
            class="mdc-select__anchor"
            aria-labelledby="outlined-select-label"
          >
            <input
              type="text"
              disabled
              readonly
              id="demo-selected-text"
              class="mdc-select__selected-text"
            />
            <i class="mdc-select__dropdown-icon"></i>
            <span class="mdc-notched-outline">
              <span class="mdc-notched-outline__leading"></span>
              <span class="mdc-notched-outline__notch">
                <span
                  id="outlined-select-label"
                  class="mdc-floating-label mdc-theme--primary"
                  >Pick a Collision Behavior</span
                >
              </span>
              <span class="mdc-notched-outline__trailing"></span>
            </span>
          </div>
          <div class="mdc-select__menu mdc-menu mdc-menu-surface">
            <ul class="mdc-list">
              <li class="mdc-list-item" data-value="REQUIRED">Required</li>
              <li
                class="mdc-list-item"
                data-value="REQUIRED_AND_HIDES_OPTIONAL"
              >
                Required and hides optional
              </li>
              <li
                class="mdc-list-item"
                data-value="OPTIONAL_AND_HIDES_LOWER_PRIORITY"
              >
                Optional and hides lower priority
              </li>
            </ul>
          </div>
        </div>
      </div>
    </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: "AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg", v: "weekly"});</script>
  </body>
</html>
index.html