Draggable Marker¶

Draggable marker is a marker that can be dragged to a new location on a map and populate its coordinates in a display.
Example¶

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Create a draggable Marker</title>
    <meta property="og:description" content="Drag the marker to a new location on a map and populate its coordinates in a display." />
    <meta charset='utf-8'>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src='https://unpkg.com/@vietmap/vietmap-gl-js@4.2.0/vietmap-gl.js'></script>
    <link rel='stylesheet' href='https://unpkg.com/@vietmap/vietmap-gl-js@4.2.0/vietmap-gl.css' />
    <style>
        body { margin: 0; padding: 0; }
        html, body, #map { height: 100%; }
    </style>
</head>
<body>
<style>
    .coordinates {
        background: rgba(0, 0, 0, 0.5);
        color: #fff;
        position: absolute;
        bottom: 40px;
        left: 10px;
        padding: 5px 10px;
        margin: 0;
        font-size: 11px;
        line-height: 18px;
        border-radius: 3px;
        display: none;
    }
</style>

<div id="map"></div>
<pre id="coordinates" class="coordinates"></pre>

<script>
    const coordinates = document.getElementById('coordinates');
    const map = new vietmapgl.Map({
        container: 'map',        
        style: 'https://maps.vietmap.vn/mt/tm/style.json?apikey=YOUR_API_KEY_HERE',
        center: [106, 10],
        zoom: 2
    });

    const marker = new vietmapgl.Marker({draggable: true})
        .setLngLat([106, 10])
        .addTo(map);

    function onDragEnd() {
        const lngLat = marker.getLngLat();
        coordinates.style.display = 'block';
        coordinates.innerHTML =
            `Longitude: ${lngLat.lng}<br />Latitude: ${lngLat.lat}`;
    }

    marker.on('dragend', onDragEnd);
</script>
</body>
</html>