Need Help to Debug my Code. My problem is that my latitude and longitude is read as undefined in my position function.

[RedWinter]

  var ref = firebase.database().ref('Location/Lat');
  var latitude;
  var longitude;
    ref.on("value", function(snapshot) {
    console.log(snapshot.val());
    latitude = snapshot.val().Latitude;
    longitude = snapshot.val().Longitude;
    console.log(latitude, longitude);
    userLocation(latitude, longitude);
    }, function (error) {
   console.log("Error: " + error.code);
    });

// Find user location
function userLocation (latitude, longitude){
    console.log(latitude, longitude)
    try{
    // Get position fn
    function position (c, lt, lg){
        console.log(c.coords);
        let lat = lt.latitude;
        let lng = lg.longitude;
        let coords = [lng, lat];
        // Show map location
        mapBoxFn(coords);
    };
    // Error fn
    function error (err){
        alert(`ERROR(${err.code}): ${err.message}`);
    };

 

[BigDady]

This might go unanswered because lots of things are missing and it looks like you're not using pure JS.
Finally where and what is c, It, lg and how did you get them in the function?

 

[MeMate]

This might go unanswered because lots of things are missing and it looks like you're not using pure JS.
Finally where and what is c, It, lg and how did you get them in the function?

Looks like firebase crab.

To the thread starter @RedWinter
There is no REACT, JQUERY or other Open Source sections in this forums yet. So please use pure JS please.
That's no patronizing. But Open Source can and will be used in a millions of ways. So your chance to get help is 1:1000000 because at least one of "yet only a few" JS Users in here should have experiences with exactly your issue. It's not even helping if you show more code. Because it is not pure JS.

Maybe we can help you with pure JS.

What is your goal? Getting latitude and longitude from USERS? Getting it constantly? That's easy. So just tell us.