Add a raster tile source
Using a Mapbox raster tile source in a map
<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8' />
    <title></title>
    <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
    <script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.38.0/mapbox-gl.js'></script>
    <link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.38.0/mapbox-gl.css' rel='stylesheet' />
    <style>
        body { margin:0; padding:0; }
        #map { position:absolute; top:0; bottom:0; width:100%; }
    </style>
</head>
<body>

<div id='map'></div>
<script>
mapboxgl.accessToken = '<your access token here>';
var tileset = 'mapbox.streets';
var map = new mapboxgl.Map({
    container: 'map', // container id
    style: {
        "version": 8,
        "sources": {
            "raster-tiles": {
                "type": "raster",
                "url": "mapbox://" + tileset,
                "tileSize": 256
            }
        },
        "layers": [{
            "id": "simple-tiles",
            "type": "raster",
            "source": "raster-tiles",
            "minzoom": 0,
            "maxzoom": 22
        }]
    },
    center: [-74.50, 40], // starting position
    zoom: 2 // starting zoom
});
</script>

</body>
</html>
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