var point = {
  "type": "Feature",
  "properties": {
    "marker-color": "#0f0"
  },
  "geometry": {
    "type": "Point",
    "coordinates": [-75.343, 39.984]
  }
};
var distance = 50;
var bearing = 90;
var units = 'miles';
 
var destination = turf.vincenty-direct(point1, distance, bearing);
destination.properties['marker-color'] = '#f00';
 
var result = {
  "type": "FeatureCollection",
  "features": [point, destination]
};
 
//=result