D3 Examples - Mapbox - locate the user

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<!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/v0.39.1/mapbox-gl.js'></script>
    <link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.39.1/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 = 'pk.eyJ1IjoiZm94YnkiLCJhIjoiY2o2NHN5eTdwMXAycTJ5bDR1bnE0NzQ0OSJ9.8EiSAtpBcpC3DywBjWpIkw';
var map = new mapboxgl.Map({
    container: 'map', // container id
    style: 'mapbox://styles/mapbox/streets-v9',
    center: [-96, 37.8], // starting position
    zoom: 3 // starting zoom
});
​
// Add geolocate control to the map.
map.addControl(new mapboxgl.GeolocateControl({
    positionOptions: {
        enableHighAccuracy: true
    },
    trackUserLocation: true
}));
</script>
​
</body>
</html>
​
    