Pro jQuery 2.0, Second Edition

CHAPTER 36

Using Deferred Objects

Throughout this book, you have seen examples that relied on callbacks – you provide a function that is executed when something occurs. A good example is the way events are handled, using a method such as click, passing in a function as an argument. The code statements in the function are not performed until the user triggers the event – until that point our function is dormant.

Deferred objects is the jQuery term for a set of enhancements to the way callbacks are used. When using deferred objects, callbacks can be used in any situation and not just for events; and they provide a lot of options and control over ...