如何在JavaScript中调用驻留在对象方法内部的函数

Question

I have a object already written by other developer which has a method that I want to use. It looks like this:

someObject : {

    sampleObject: function {

        function setAd(){
            //some code
        }
    }
}

I want use/call the function setAd() outside of object. Is it possible? I tried but it shows undefined

Answer 1

No, this is not possible. In javascript functions behave like variables. They can be for example hoisted, but more importantly they are bound to a certain scope, where they have been declared and you can call them only there.

You can check out this article on w3schools: https://www.w3schools.com/js/js_scope.asp
And also: https://www.w3schools.com/js/js_function_closures.asp