how to return latitude and longitude of the user in Javascript?

Question

I want to make return latitude and longitude of the current user from the function and I have written the following code but this piece of code is saying "undefined" as a result. If anybody knows the solution, please answer

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

Mihai Alexandru-Ionut · Accepted Answer · 2017-10-02T09:06:00.410

getCurrentPosition is executing asynchronous and console.log(lat_lng); is executed before you get the result from follow function:

navigator.geolocation.getCurrentPosition(showPosition);

You have to use a callback function instead.

function getLocation(callback) {
    if (navigator.geolocation) {
        var lat_lng = navigator.geolocation.getCurrentPosition(function(position){
        console.log(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);
});

Working solution.

@AbhayjeetSingh, i updated it with a working solution. – Mihai Alexandru-Ionut Oct 02 '17 at 08:58 — Mihai Alexandru-Ionut, Oct 02 '17 at 08:58

how to return latitude and longitude of the user in Javascript?

1 Answers1