How do I call a function within an IIFE expression

Question

Just started out learning js and using the book Javascirpt an Absolute Beginner's Guide. Question is from an example in the book:

var awesomeSauce = (
    function () {     
        var secretCode = "Zorb!";
        function privateCheckCode(code) { 
            if (secretCode == code) { 
                alert("You are awesome!");   
            } else { 
                alert("Try again!");   
            }     
        }
    // the public method we want to return     
        return { 
            checkCode: privateCheckCode     
        }; 
    })();

Question is how do I go about to call this code?

awesomeSauce("Zorg!"); 

doesnt work and neither does

awesomeSauce().privateCheckCode("Zorg!");

Answer 1

awesomeSauce.checkCode("Zorg!");

The IIFE returns an object with the checkCode property, that property is the (private) function.

The point of the IIFE is that this scopes the variables and functions within, so that they are not accessible from outside (e.g. privateCheckCode and secretCode exist only inside the IIFE).

Think of the returned object as an "export" of selected values or functionality.