What Is Meant By 'javascript Namespacing'?

Possible Duplicate: Javascript Namespacing Im pretty new to JavaScript and was wondering if anyone could give me a good description of what is meant by JavaScript Namespacing? A

Solution 1:

JavaScript is designed in such a way that it is very easy to create global variables that have the potential to interact in negative ways. The practice of namespacing is usually to create an object literal encapsulating your own functions and variables, so as not to collide with those created by other libraries:

varMyApplication = {
  var1: someval,
  var2: someval,
  myFunc: function() {
    // do stuff
  }
};

Then instead of calling myFunc() globally, it would always be called as:

MyApplication.myFunc();

Likewise, var1 always accessed as:

console.log(MyApplication.var1);

In this example, all of our application's code has been namespaced inside MyApplication. It is therefore far less likely that our variables will collide with those created by other libraries or created by the DOM.

Solution 2:

I use this namespacing technique, along with "use strict" outlined by Crockford

varMyNamespace = (function () {
    "use strict"; 

    functionSomeOtherFunction() {

    }

    functionPage_Load() {

    }

    return { //Expose Page_Load: Page_Load,
        SomeOtherFunction: SomeOtherFunction
    };
} ());

MyNamespace.Page_Load();

Solution 3:

Read up on a simple tutorial Here

Namespacing is used to avoid polluting the global namespace (no window. variables). In truth, each namespace is just a big variable, that has many properties and methods.

This happens, because in javascript you can have whole functions (methods) as variables