Ext JS has been used to create thousands of apps till now and the number continuous to increase. Ever since it was launched in 2007, a variety of newer versions of the same have been launched thus ensuring that the framework stays completely compatible with the enterprise related development needs. The best part here is that you can smoothly move from one version to another as it has been developed that way. As a user, you won’t have to frequently consult the guides to see what has to be done and how!
As mentioned above, there is a huge library that comes along with the ext and as a developer you will not have to source any of the components externally or for that matter write a code for it. Ext has been built on the basic concepts of MVC and MVVM which makes it easy for the developers to learn working around it. This saves the overall time and the productivity of the people working on the project.
In addition to the components that are made available for the developers, the ext JS comes with a huge set of tools as well. All of these tools are created in a way that it gives you a very clear vision of how your development related work would look and how it would shape up. Scalability is one area that is taken care of through these tools provided by Sencha, the brand that has introduced the Ext. Moreover, since majority of these tools are in perfect sync with ext, you don’t need to use any external plug-in for the same.