Chapter 9: Plug-In API

I do two at a time now
I've developed a technique
    —Devo, "Fräulein"

Whenever a task is to be performed two or more times, it is a good idea to apply the DRY principle—Don't Repeat Yourself. To facilitate this, jQuery provides several tools for developers that go beyond simple iteration and function creation. Plug-in development is a technique that proves rewarding time and time again.

In this chapter, we'll take a brief look at the basics of using another developer's plug-in, and then delve into the various ways of extending jQuery with plug-ins we define ourselves.