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Ext JS Essentials by Stuart Ashworth, Andrew Duncan

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Chapter 3. Reacting to User and Application Interactions

Developing effective applications with Ext JS requires a solid understanding of event-driven programming and how actions are performed, based on user and application interactions. Ext JS is an event-driven framework and uses events to control the flow of the application.

Events can be raised by user input, internally by the framework or by our own application code. For example, when a user clicks a button with their mouse, a click event will be fired by the button's instance. We can then attach a listener to this event and execute our handler code when it is fired. Have a look at the following diagram:

This chapter will explore in detail the events in Ext JS. The topics covered in this chapter ...

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