Book Image

jQuery Design Patterns

By : Thodoris Greasidis
Book Image

jQuery Design Patterns

By: Thodoris Greasidis

Overview of this book

jQuery is a feature-rich JavaScript library that makes HTML document traversal and manipulation, event handling, animation, and Ajax much simpler with an easy-to-use API that works across a variety of browsers. With a combination of versatility and extensibility, jQuery has changed the way that millions of people write JavaScript. jQuery solves the problems of DOM manipulation, event detection, AJAX calls, element selection and document queries, element attribute and data management, as well as object management utilities. This book addresses these problems and shows you how to make the best of jQuery through the various design patterns available. The book starts off with a refresher to jQuery and will then take you through the different design patterns such as facade, observer, publisher/subscriber, and so on. We will also go into client-side templating techniques and libraries, as well as some plugin development patterns. Finally, we will look into some best practices that you can use to make the best of jQuery.
Table of Contents (18 chapters)
jQuery Design Patterns
About the Author
About the Reviewer

Programming with callbacks

A Callback can be defined as a function that is passed as an invocation argument to another function or method (which is referred to as a Higher-Order Function) and is expected to be executed at some later point of time. In this way, the piece of code that was handed our Callback will eventually invoke it, propagating the results of an operation or event back to the context that the Callback was defined.

Callbacks can be characterized as synchronous or asynchronous, based on the way that the invoked method operates. A Callback is characterized as synchronous when it is executed by a blocking method. On the other hand, JavaScript developers are more familiar with asynchronous callbacks, also called deferred callbacks, which are set to be executed after an asynchronous procedure finishes or when a specific event occurs (page load, click, AJAX response arrival, and so on).

Callbacks are widely used in JavaScript applications since they are an integral part of many core...