Question

I am wondering if I need public method, I need to use this

var TestClass = function() {

    this.pub = function() {
              blahblah;
        };

If need private method(inner method), I need to use

var TestClass = function() {

    var pri = function() {
              blahblah;
        };

Is this true?

Answer 1

No, this is not true. The inner function (pri) is a function, not a method. Although the difference is negligible in javascript (since every function can be used as a method and vice versa), you still can’t call it as this.pri(), which would be possible with true private methods.

As a side note, despite its Java-alike syntax, Javascript, especially its object model, is significantly different from Java/C++/C#. In particular, such concepts as class and encapsulation don’t exist in Javascript.