Map Events

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)!;
    map.addListener(name, () => {
        eventRow.className = 'event active';
        setTimeout(() => {
            eventRow.className = 'event inactive';
        }, 1000);
    });
}

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

    const mapElement = document.querySelector('gmp-map')!;

    populateTable();

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

    for (const event of events) {
        setupListener(innerMap, event);
    }
}

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

    for (const event of events) {
        const eventDiv = document.createElement('div');
        eventDiv.className = 'event';
        eventDiv.id = event;
        eventDiv.innerText = event;
        eventsTable.appendChild(eventDiv);
    }
}

void init();
index.ts

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);
    map.addListener(name, () => {
        eventRow.className = 'event active';
        setTimeout(() => {
            eventRow.className = 'event inactive';
        }, 1000);
    });
}

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

    const mapElement = document.querySelector('gmp-map');

    populateTable();

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

    for (const event of events) {
        setupListener(innerMap, event);
    }
}

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

    for (const event of events) {
        const eventDiv = document.createElement('div');
        eventDiv.className = 'event';
        eventDiv.id = event;
        eventDiv.innerText = event;
        eventsTable.appendChild(eventDiv);
    }
}

void init();
index.js

/* 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>
    <head>
        <title>Map Events</title>

        <link rel="stylesheet" type="text/css" href="./style.css" />
        <script type="module" src="./index.js"></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="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