A full screen leaflet.js map by d3noob

index.html

<!DOCTYPE html>
<html>
<head>
    <title>Full Screen Leaflet Map</title>
    <meta charset="utf-8" />
    <link 
        rel="stylesheet" 
        href="//cdn.leafletjs.com/leaflet-0.7/leaflet.css"
    />
    <style>
        body {
            padding: 0;
            margin: 0;
        }
        html, body, #map {
            height: 100%;
            width: 100%;
        }
    </style>
</head>
<body>
    <div id="map"></div>

    <script
        src="//cdn.leafletjs.com/leaflet-0.7/leaflet.js">
    </script>

    <script>
        var map = L.map('map').setView([-41.2858, 174.78682], 14);
        mapLink = 
            '<a href="//openstreetmap.org">OpenStreetMap</a>';
        L.tileLayer(
            '//{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
            attribution: '&copy; ' + mapLink + ' Contributors',
            maxZoom: 18,
            }).addTo(map);
    </script>
</body>
</html>