What is a best practice for ensuring “this” context in Javascript?

Question

Here\'s a sample of a simple Javascript class with a public and private method (fiddle: http://jsfiddle.net/gY4mh/).

function Example() {
    function privateFun         


        

Answer 1

Using closure. Basically any variable declared in function, remains available to functions inside that function :

var Example = (function() {
    function Example() {
        var self = this; // variable in function Example
        function privateFunction() {                  
            // The variable self is available to this function even after Example returns. 
            console.log(self);
        }

        self.publicFunction = function() {
            privateFunction();
        }
    }

    return Example;
})();

ex = new Example;
ex.publicFunction();