In this ExtJS tutorial, the author provides helpful tips for successful Ext JS plug-in development. Basic questions are answered such as: “What is an Ext JS plug-in?” and more. Also discussed are advanced methods of adding your own custom functionality to the Ext JS framework. We highly recommend this article to those creating UI’s with ExtJS.
The ExtJS 3.0 library is a little large and can require a few seconds to load all the scripts for the page. Therefore the most convenient way address this is to create a preload message which will let your users know that the loading is in process.
From this short tutorial you will learn how to control the Ext.Window panel. Author explains how to hide or show it on button or link click.