Using the Extjs Framework

Question

I am required to use the Extjs framework in my next project. So what features are available in it? There are so many javascript frameworks available in the market like the DOJO framework.

Answer 1

How it stands up to competition...

To see how Extjs stands up to its competitors, you could review the impressive comparison chart hosted on Wikipedia: http://en.wikipedia.org/wiki/Comparison_of_JavaScript_frameworks

Where to get it...

I'm sure you could find tons of information on http://www.extjs.com/. Keep in mind that you're going to pay a handsome fee to use Extjs.

How to learn it...

If your initial impression is good, you could peel into the Learning Center where you'll find API documentation, tutorials, and more.

Answer 2

To learn about different features, just have a look at the ExtJS Examples page. It should give you a good initial impression of what's available. There are grids, editable grids, tabbed views, trees, windows and other dialogs, menus, toolbars, etc.

Be aware that all of the functionality shown on the examples is not available out-of-the-box, though - some of them require you to include extensions (plugins) developed by the ExtJS user community.

Answer 3

In my opinion, the principale avantage of ExtJS is the Store mecanism. you can have a store which hold your data (as a database table) and tell some UI widget to display data from the store. this is great because:

• you bind your widget to a store, then it automatically update it's ui when element in the store are added/modified/deleted
• you can easily display your data in multiple form without worrying about updating echa place (each widget update itself automatically)

others thing done right:

• event
• ability to extend ExtJS classes