Chapter 15. Extensions and plug-ins

This chapter covers

  • Understanding the basics of prototypal inheritance
  • Developing your first extension
  • Getting to know how plug-ins work
  • Developing a real-world plug-in

Every Ext JS developer faces the challenge where reusability becomes an issue. Oftentimes, a component of an application is required to appear more than once within the application’s usage lifetime. In much larger applications, reusability of components is paramount to performance as well as maintainability of the code itself. This is why we’ll focus on the concept of reusability with the use of framework extensions and plug-ins.

In the first section of this chapter, you’ll learn the basics of extending (subclassing) with Ext JS. You’ll ...

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