Question

I know that when getting return data from webmethods in javascript this code is valid, but how about if it is a return from another js method?

The alert is never ran so I am thinking no, but I want to make sure it is this and not other code throwing the error:

function previousWinner() {
    //Webservice call
    services.isUserAWinner(ID, events, function (response) {
           //Code

            //Return
            return true;
        }
        //Return
        return false;
    });
}

And later in my code I call this

  previousWinner(function (response) {
        alert(response);
        //Check to see if user is a winner
        if (!response) {
            //Check likes
            hasUserLiked();
        }
    });

Does previousWinner(function (response) { only work on web method calls?

Answer 1

This is how you should define previousWinner where ‘code’ is some boolean that tells you to run the callback.

function previousWinner(callback) {
    //Webservice call
    services.isUserAWinner(ID, events, function (response) {
        //Code
        var code = response == true; // if response is a boolean this will work, otherwise you need to run some other type of conditional 
        if (code && callback) {
            callback(response);
            //Return
            return true;
        }
        //Return
        return false;
    });
}