Leaflet

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Documento HTML</title>
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" integrity="sha256-p4NxAoJBhIIN+hmNHrzRCf9tD/miZyoHS5obTRR9BMY=" crossorigin=""/>
<script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js" integrity="sha256-20nQCchB9co0qIjJZRGuk2/Z9VM+kNiyxNV1lvTlZBo=" crossorigin=""></script>
<script src="https://unpkg.com/leaflet.vectorgrid@latest/dist/Leaflet.VectorGrid.js"></script>
<style>
  html,
  body {
      margin: 0;
      padding: 0;
      height: 100%;
  }
  .map {
    width: 100%;
    height: 100%;
  }
</style>
</head>
<body>

var map = L.map('map').setView([40.02, -4.9], 14);

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

</script>
</body>
</html>