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Learning jQuery 3

Learning jQuery 3

By : Jonathan Chaffer
2.7 (3)
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Learning jQuery 3

Learning jQuery 3

2.7 (3)
By: Jonathan Chaffer

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 (16 chapters)
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Keeping an eye on the request


So far, it has been sufficient for us to make a call to an Ajax method and patiently await the response. At times, though, it is handy to know a bit more about the HTTP request as it progresses. If such a need arises, jQuery offers a suite of functions that can be used to register callbacks when various Ajax-related events occur.

The .ajaxStart() and .ajaxStop() methods are two examples of these observer functions. When an Ajax call begins with no other transfer in progress, the .ajaxStart() callback is fired. Conversely, when the last active request ends, the callback attached with .ajaxStop() will be executed. All of the observers are global, in that they are called when any Ajax communication occurs, regardless of what code initiates it. And all of them, can only be bound to $(document).

We can use these methods to provide some feedback to the user in the case of a slow network connection. The HTML for the page can have a suitable loading message appended:

...

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