JavaScript namespace pattern (similiar to properties of objects)

Question

what purpose of such pattern?

var ns=function(){
  //do some stuff
}

ns.test=function(){
  //do another stuff
}

I saw code that is similar to that, but I don't understand advantages of such pattern.

Also seems like this is similiar to properties of objects.

also this pattern some times used with closures, and it seems that jquery uses it, but not sure about that.

Thanks!

Jay · Accepted Answer · 2011-04-25 16:58:14Z

1

For one thing, it ensures that your variable and function names do not clash with names from other scripts that may be included (like advertising, analytics, libraries that don't namespace etc).

answered Apr 25, 2011 at 16:58

Jay

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2 Comments

excanoe Over a year ago

so these two functions technically not relative each other?

Jay Over a year ago

Well, the way that it works is ns is a function (and an object, since functions are first-class in Javascript), and it closes over the other properties such as ns.test, which also happens to be a function. So the function test belongs to the object ns.

Eli · Accepted Answer · 2011-04-25 16:58:22Z

0

This pattern arises because in JavaScript, functions are first-class objects with their own properties and methods. This allows functions to be executed by themselves, but also mimic things in other languages. This allows you to do some pretty powerful things like mimicing static classes, memoization, namespacing, etc.

answered Apr 25, 2011 at 16:58

Eli

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