Immediately execute function notation

Using the Execute functions now (immediately-invoked function Expression,iife), you can achieve the purpose of not exposing private members.

var Module1 = (function () {

var _count = 0;

var m1 = function () {
//...
};

var m2 = function () {
//...
};

return {
M1:M1,
M2:m2
};

})();

Using the notation above, the external code cannot read the internal _count variable.

Console.info (Module1._count); Undefined

Module1 is the basic way of writing JavaScript modules.

Immediately execute function notation