Draw a circle in google maps

map-circle.js

module.exports = (coord, brng, dist) => {
    dist = dist / 3958;
    brng = brng.toRad();  
    var lat1 = coord[1].toRad(), lon1 = coord[0].toRad();
    var lat2 = Math.asin(Math.sin(lat1) * Math.cos(dist) + Math.cos(lat1) * Math.sin(dist) * Math.cos(brng));
    var lon2 = lon1 + Math.atan2(Math.sin(brng) * Math.sin(dist) * Math.cos(lat1), Math.cos(dist) - Math.sin(lat1) * Math.sin(lat2));
    if (isNaN(lat2) || isNaN(lon2)) return null;
    return [lon2.toDeg(), lat2.toDeg()];
}