JSFiddle - React, Tailwind, and code Playground

JavaScript

function getLocation(callback) {
    if (navigator.geolocation) {
        var lat_lng = navigator.geolocation.getCurrentPosition(function(position){
          var user_position = {};
          user_position.lat = position.coords.latitude; 
          user_position.lng = position.coords.longitude; 
          callback(user_position);
        });
    } else {
        alert("Geolocation is not supported by this browser.");
    }
}
getLocation(function(lat_lng){
  console.log(lat_lng);
});