Book Image

Learning jQuery - Fourth Edition - Fourth Edition

Book Image

Learning jQuery - Fourth Edition - Fourth Edition

Overview of this book

To build interesting, interactive sites, developers are turning to JavaScript libraries such as jQuery to automate common tasks and simplify complicated ones. Because many web developers have more experience with HTML and CSS than with JavaScript, the library's design lends itself to a quick start for designers with little programming experience. Experienced programmers will also be aided by its conceptual consistency. LearningjQuery - Fourth Edition is revised and updated version of jQuery. You will learn the basics of jQuery for adding interactions and animations to your pages. Even if previous attempts at writing JavaScript have left you baffled, this book will guide you past the pitfalls associated with AJAX, events, effects, and advanced JavaScript language features. Starting with an introduction to jQuery, you will first be shown how to write a functioning jQuery program in just three lines of code. Learn how to add impact to your actions through a set of simple visual effects and to create, copy, reassemble, and embellish content using jQuery's DOM modification methods. The book will take you through many detailed, real-world examples, and even equip you to extend the jQuery library itself with your own plug-ins.
Table of Contents (24 chapters)
Learning jQuery Fourth Edition
About the Authors
About the Reviewers

DOM tree manipulation

The .attr() and .prop() methods are very powerful tools, and with them we can make targeted changes to the document. We still haven't seen ways to change the overall structure of the document though. To actually manipulate the DOM tree, we'll need to learn a bit more about the function that lies at the very heart of the jQuery library.

The $() function revisited

From the start of this book, we've been using the $() function to access elements in a document. As we've seen, this function acts as a factory, producing new jQuery objects that point to the elements described by CSS selectors.

This isn't all that the $() function can do, however. It also boasts a feature so powerful that it can change not only the visual appearance but also the actual contents of a page. Simply by passing a snippet of HTML code to the function, we can create an entirely new DOM structure from thin air.


Accessibility reminder

We should keep in mind, once again, the inherent danger in making...