turf shortest path

HTML

<script src="https://maps.googleapis.com/maps/api/js?v=3&amp;libraries=geometry"></script>
<script src="https://npmcdn.com/@turf/[email protected]/turf.min.js"></script>
<div id="map"></div>

CSS

html,
body,
#map {
  height: 100%;
  width: 100%;
  padding: 0px;
  margin: 0px;
}

JavaScript

var map = new google.maps.Map(document.getElementById('map'), {
		  zoom: 5,
		  minZoom: 1,
		  center: {
		    lat: -6,
		    lng: 2
		  },
		  streetViewControl: false,
		  mapTypeId: google.maps.MapTypeId.ROADMAP
		});

// Turf format :Lon, Lat		
var start = [-5, -6];
var end = [9, -6];
var options = {
  obstacles: turf.polygon([[[0, -7], [5, -7], [5, -3], [0, -3], [0, -7]]]),
  //minDistance: (2)
};

var path = turf.shortestPath(start, end, options);
     map.data.addGeoJson(path);
     
     var polyCoords = [
          {lat: -7, lng: 0},
          {lat: -3, lng: 0},
          {lat: -3, lng: 5},
          {lat: -7, lng: 5}
        ];

        // Construct the polygon.
        var bpoly = new google.maps.Polygon({
          paths: polyCoords,
          strokeColor: '#FF0000',
          strokeOpacity: 0.8,
          strokeWeight: 2,
          fillColor: '#FF0000',
          fillOpacity: 0.35
        });
        bpoly.setMap(map);