What is the significance of using the functionName: function syntax in JavaScript for return statements?

Being a beginner in the world of JavaScript, I recently came across this code snippet in a tutorial. However, I am confused about the usage of functionName: function in the return statement.

Specifically, why do we have getID:function() and setID: function() in the following code? Could someone provide an explanation?

function celebrityID () {
    var celebrityID = 999;

    return {
        getID: function ()  {

          return celebrityID;
        },
        setID: function (theNewID)  {

            celebrityID = theNewID;
        }
    }

}

Answer №1

Within your celebrityID () method, you are returning an object with two properties that are functions.

You could use:

var myVar = new celebrityID();

myVar.getID(); // myVar will equal 999

This is similar to creating an object from a class.

Answer №2

One reason for including a return statement in the function getID() is to ensure that the variable celbId actually contains a valid celebrity ID.

var cid = celebrityID();
var celbId = cid.getID();

If the return statement is omitted, the function getID() would not provide any value to assign to celbId, resulting in an undefined variable.

This highlights the importance of carefully considering what your functions should return, especially when dealing with data manipulation and assignments.

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