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In today's modern web applications it is typical to include many libraries, widgets and snippets of code from many different sources. You must be mindful that other developers may be interacting with your code simply by both sets of code being included on the same page. It is not a safe assumption that you have the entire global namespace at your disposal.

Why use namespaces?

The Ext JS forums are an example which utilizes 3 distinctly different sets of scripts from different organizations. We use Ext JS for enhancements, Google Analytics for tracking site usage and the native vBulletin scripts. You can see how all of this code from different sources has been included in the same page. You can also imagine how that there is the potential for a collision as more and more scripts are added.



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http://extjs.com/blog/2008/05/28/use-namespaces/




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