Book Image

Learning jQuery - Fourth Edition

By : Karl Swedberg, Jonathan Chaffer
Book Image

Learning jQuery - Fourth Edition

By: Karl Swedberg, Jonathan Chaffer

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


To complete these exercises, you will need the index.html file for this chapter as well as the finished JavaScript code as found in complete.js. These files can be downloaded from the Packt Publishing web site at

The challenge exercises may require the use of the official jQuery documentation at

  1. Alter the code that introduces the back to top links so that the links only appear after the fourth paragraph.

  2. When a back to top link is clicked, add a new paragraph after the link containing the message You were here. Ensure that the link still works.

  3. When the author's name is clicked, turn it bold (by adding an element, rather than manipulating classes or CSS attributes).

  4. Challenge: On a subsequent click of the bolded author's name, remove the <b> element that was added (thereby toggling between bold and normal text).

  5. Challenge: Add a class of inhabitants to each of the chapter's paragraphs without calling .addClass(). Make sure...