demo/index.html


<!DOCTYPE html>
<html lang="en">
<head>
	<base target="_top">
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	
	<title>Quick Start - Leaflet</title>
	
	<link rel="shortcut icon" type="image/x-icon" href="docs/images/favicon.ico" />

    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.3/dist/leaflet.css" integrity="sha256-kLaT2GOSpHechhsozzB+flnD+zUyjE2LlfWPgU04xyI=" crossorigin=""/>
    <script src="https://unpkg.com/leaflet@1.9.3/dist/leaflet.js" integrity="sha256-WBkoXOwTeyKclOHuWtc+i2uENFpDZ9YPdf5Hf+D7ewM=" crossorigin=""></script>
    <link rel="stylesheet" href="https://unpkg.com/leaflet.markercluster@1.4.1/dist/MarkerCluster.css" />
    <link rel="stylesheet" href="https://unpkg.com/leaflet.markercluster@1.4.1/dist/MarkerCluster.Default.css" />
    <script src="https://unpkg.com/leaflet.markercluster@1.4.1/dist/leaflet.markercluster.js" ></script>
   
	<style>
		html, body {
			height: 100%;
			margin: 0;
		}
		.leaflet-container {
			height: 100%;
			width: 100%;
			max-width: 100%;
			max-height: 100%;
		}
	</style>

	
</head>
<body>


<div id="map" style="width: 100%; height: 100%;"></div>
<script>

	const map = L.map('map').setView([52.2441,21.0245], 11);

	const tiles = L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
		maxZoom: 19,
		attribution: '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
	}).addTo(map);


    const markers = L.markerClusterGroup();
    map.addLayer(markers);

    const source = new EventSource('/talk');
    source.addEventListener('open', function(e) {
        popup
            .setContent('Connection to the server opened.')
            .openOn(map);
    }, false);
    source.onmessage = function(e) {
        markers.clearLayers();


        const vehicles = JSON.parse(e.data);
        for (const vehicle of vehicles) {
            const position = vehicle.position;
            markers.addLayer(L.marker([position.latitude, position.longitude]));
        }
    };


</script>


</body>
</html>