What is meant by 'JavaScript Namespacing'?

bc17 picture bc17 · Dec 15, 2011 · Viewed 20.9k times · Source

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?

Also any resources e.g. articles etc, are much appreciated on the subject.

Answer

Michael Berkowski picture Michael Berkowski · Dec 15, 2011

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:

var MyApplication = {
  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.