Book Image

Learning jQuery 3 - Fifth Edition

By : Jonathan Chaffer, Karl Swedberg
Book Image

Learning jQuery 3 - Fifth Edition

By: Jonathan Chaffer, Karl Swedberg

Overview of this book

If you are a web developer and want to create web applications that look good, are efficient, have rich user interfaces, and integrate seamlessly with any backend using AJAX, then this book is the ideal match for you. We’ll show you how you can integrate jQuery 3.0 into your web pages, avoid complex JavaScript code, create brilliant animation effects for your web applications, and create a flawless app. We start by configuring and customising the jQuery environment, and getting hands-on with DOM manipulation. Next, we’ll explore event handling advanced animations, creating optimised user interfaces, and building useful third-party plugins. Also, we'll learn how to integrate jQuery with your favourite back-end framework. Moving on, we’ll learn how the ECMAScript 6 features affect your web development process with jQuery. we’ll discover how to use the newly introduced JavaScript promises and the new animation API in jQuery 3.0 in great detail, along with sample code and examples. By the end of the book, you will be able to successfully create a fully featured and efficient single page web application and leverage all the new features of jQuery 3.0 effectively.
Table of Contents (23 chapters)
Title Page
About the Authors
About the Reviewer
Customer Feedback

Adding new global functions

Some of the built-in capabilities of jQuery are provided via what we have been calling global functions. As we've seen, these are actually methods of the jQuery object, but practically speaking, they are functions within a jQuery namespace.

A prime example of this technique is the $.ajax() function. Everything that $.ajax() does could be accomplished with a regular global function called ajax(), but this approach would leave us open for function name conflicts. By placing the function within the jQuery namespace, we only have to worry about conflicts with other jQuery methods. This jQuery namespace also signals to those who might use the plugin that the jQuery library is required.

Many of the global functions provided by the core jQuery library are utility methods; that is, they provide shortcuts for tasks that are frequently needed, but not difficult to do by hand. The array-handling functions $.each(), $.map(), and $.grep() are good examples of these. To illustrate...