Question

first post here! Trying to fix this and looking for an answer online but not luck -I know its out there, but cant seem to figure it out- I have a javascript code to return the location of the user as follows:

var myLatlon = navigator.geolocation.getCurrentPosition(onSuccess, onError);

And the function is as follows:

var onSuccess = function(position) {
    var latlon=position.coords.latitude+','+position.coords.longitude;
    return latlon;
};

When I do a console.log(latlon); inside the function above it returns the actual latitude and longitude separated by a comma.

But when I do a console.log(myLatlon) after the first line; it returns: {“timer”:true}

I need to return from my function the actual latitude and longitude. Any ideas?

Answer 1

You cannot return the value from navigator.geolocation.getCurrentPosition. That’s the nature of asynchronous calls. The call to navigator.geolocation.getCurrentPosition finishes way before the callback is called. You have to use your coordinates within your onSuccess callback

Usually restructuring your code has almost the same effect as returning it.

navigator.geolocation.getCurrentPosition(function(position){
    // Use position from here
}, onError);
// This line is reached before the commented line in the anonymous function above, that's why you can't return the value