2.9. Custom Events and jQuery Plug-Ins

Custom events, often used to great effect in jQuery plug-ins, are a great way to architect any piece of logic that interacts with the DOM. If you’re unfamiliar with jQuery plug-ins, skip ahead to Appendix B, which includes a jQuery primer.

If you’re adding a piece of functionality to your application, always consider whether it could be abstracted and split out in a plug-in. This will help with decoupling and could leave you with a reusable library.