<div id='map'></div>
<script>
var map = new mapboxgl.Map({
    container: 'map',
    style: 'mapbox://styles/mapbox/streets-v9',
    center: [-96, 37.8],
    zoom: 3
});

var popup = new mapboxgl.Popup({closeOnClick: false})
    .setLngLat([-96, 37.8])
    .setHTML('<h1>Hello World!</h1>')
    .addTo(map);
</script>
