This example shows setting collision behavior for a marker.
Read the documentation.
TypeScript
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();
JavaScript
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();
CSS
: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%;
}
HTML
<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>
Try Sample
Clone Sample
Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.
git clone -b sample-advanced-markers-collision https://github.com/googlemaps/js-samples.gitcd js-samplesnpm inpm start
Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME.
git checkout sample-SAMPLE_NAMEnpm inpm start