Map Events

This example shows which events are triggered as you interact with the map.

Read the documentation.

TypeScript

const events = [
    'bounds_changed',
    'center_changed',
    'click',
    'contextmenu',
    'dblclick',
    'drag',
    'dragend',
    'dragstart',
    'heading_changed',
    'idle',
    'maptypeid_changed',
    'mousemove',
    'mouseout',
    'mouseover',
    'projection_changed',
    'resize',
    'rightclick', // use contextmenu
    'tilesloaded',
    'tilt_changed',
    'zoom_changed',
];

function setupListener(map: google.maps.Map, name: string) {
    const eventRow = document.getElementById(name) as HTMLElement;
    google.maps.event.addListener(map, name, () => {
        eventRow.className = 'event active';
        const timeout = setTimeout(() => {
            eventRow.className = 'event inactive';
        }, 1000);
    });
}

async function initMap() {
    // Request needed libraries.
    (await google.maps.importLibrary('maps')) as google.maps.MapsLibrary;

    const mapElement = document.querySelector(
        'gmp-map'
    ) as google.maps.MapElement;

    populateTable();

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

    for (let i = 0; i < events.length; i++) {
        setupListener(innerMap, events[i]);
    }
}

// Dynamically create the table of events from the defined hashmap
function populateTable() {
    const eventsTable = document.getElementById('sidebar') as HTMLElement;

    for (let i = 0; i < events.length; i++) {
        const eventDiv = document.createElement('div');
        eventDiv.className = 'event';
        eventDiv.id = events[i];
        eventDiv.innerText = events[i];
        eventsTable.appendChild(eventDiv);
    }
}

initMap();
index.ts

JavaScript

const events = [
    'bounds_changed',
    'center_changed',
    'click',
    'contextmenu',
    'dblclick',
    'drag',
    'dragend',
    'dragstart',
    'heading_changed',
    'idle',
    'maptypeid_changed',
    'mousemove',
    'mouseout',
    'mouseover',
    'projection_changed',
    'resize',
    'rightclick', // use contextmenu
    'tilesloaded',
    'tilt_changed',
    'zoom_changed',
];
function setupListener(map, name) {
    const eventRow = document.getElementById(name);
    google.maps.event.addListener(map, name, () => {
        eventRow.className = 'event active';
        const timeout = setTimeout(() => {
            eventRow.className = 'event inactive';
        }, 1000);
    });
}
async function initMap() {
    // Request needed libraries.
    (await google.maps.importLibrary('maps'));
    const mapElement = document.querySelector('gmp-map');
    populateTable();
    // Get the inner map.
    let innerMap = mapElement.innerMap;
    innerMap.setOptions({
        mapTypeControl: false,
    });
    for (let i = 0; i < events.length; i++) {
        setupListener(innerMap, events[i]);
    }
}
// Dynamically create the table of events from the defined hashmap
function populateTable() {
    const eventsTable = document.getElementById('sidebar');
    for (let i = 0; i < events.length; i++) {
        const eventDiv = document.createElement('div');
        eventDiv.className = 'event';
        eventDiv.id = events[i];
        eventDiv.innerText = events[i];
        eventsTable.appendChild(eventDiv);
    }
}
initMap();
index.js

CSS

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

#container {
    height: 100%;
}

#sidebar {
    width: 280px;
    padding: 2px;
    margin-left: 10px;
    margin-top: 10px;
    overflow: hidden;
    font-size: 15px;
    font-family: 'Droid Sans Mono', monospace;
    max-width: 300px;
    background-color: white;
}

.active {
    background-color: #99ccff;
}

.inactive {
    background-color: white;
}
style.css

HTML

<html>
    <head>
        <title>Map Events</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.js"></script>
        <!-- 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: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "weekly"});</script>
    </head>
    <body>
        <gmp-map center="37.4419, -122.1419" zoom="13">
            <div id="container" slot="control-inline-start-block-start">
                <div id="sidebar"></div>
            </div>
        </gmp-map>
    </body>
</html>
index.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 https://github.com/googlemaps-samples/js-api-samples.git
  cd samples/map-events
  npm i
  npm start