Get users Latitude and Longitude

latlng_promise.js

_getPreciseLocation() {
  return new Promise((resolve, reject) => {
    if (navigator.geolocation) {
      navigator.geolocation.getCurrentPosition((position) => {
      if(position){
        resolve([position.coords.latitude, position.coords.longitude]);
      } else {
        reject(Error("We didnt get a location"))
      }  
    });
    } else {
      reject(Error("Browser doesnt suport geolocation"))
    }
  });
}