Book Image

Learning jQuery 1.3

By : Jonathan Chaffer, Karl Swedberg
Book Image

Learning jQuery 1.3

By: Jonathan Chaffer, Karl Swedberg

Overview of this book

<p>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. <br /><br />Revised and updated for version 1.3 of jQuery, this book teaches you 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.<br /><br />In this book, the authors share their knowledge, experience, and enthusiasm about jQuery to help you get the most from the library and to make your web applications shine. The book introduces jQuery and shows how you can write a functioning jQuery program in just three lines of code. It then guides you through CSS selectors and shows how to enhance the basic event handling mechanisms to give them a more elegant syntax. You will then learn to add impact to your actions through a set of simple visual effects and also to create, copy, reassemble, and embellish content using jQuery's DOM modification methods. You will also learn to send and retrieve information with AJAX methods. The book will then step you through many detailed, real-world examples and even equip you to extend the jQuery library itself with your own plug-ins.</p>
Table of Contents (22 chapters)
Learning jQuery 1.3
Credits
Foreword
About the Authors
About the Reviewers
Preface
Index

DOM traversal methods


After creating a jQuery object using $(), we can alter the set of matched elements we are working with by calling one of these DOM traversal methods. DOM traversal methods are discussed in detail in Chapter 2.

Traversal Method

Returns a jQuery object containing…

.filter(selector)

Selected elements that match the given selector.

.filter(callback)

Selected elements for which the callback function returns true.

.eq(index)

The selected element at the given 0-based index.

.slice(start, [end])

Selected elements in the given range of 0-based indices.

.not(selector)

Selected elements that do not match the given selector.

.add(selector)

Selected elements, plus any additional elements that match the given selector.

.find(selector)

Descendant elements that match the selector.

.contents()

Child nodes (including text nodes).

.children([selector])

Child nodes, optionally filtered by a selector.

.next([selector])

The sibling immediately following each selected element, optionally filtered by a selector.

.nextAll([selector])

All siblings following each selected element, optionally filtered by a selector.

.prev([selector])

The sibling immediately preceding each selected element, optionally filtered by a selector.

.prevAll([selector])

All siblings preceding each selected element, optionally filtered by a selector.

.siblings([selector])

All siblings, optionally filtered by a selector.

.parent([selector])

The parent of each selected element, optionally filtered by a selector.

.parents([selector])

All ancestors, optionally filtered by a selector.

.closest selector

The first element that matches the selector, starting at the selected element and moving up through its ancestors in the DOM tree.

.offsetParent()

The positioned parent (e.g. relative, absolute) of the first selected element.

.andSelf()

The selected elements, plus the previous set of selected elements on the internal jQuery stack.

.end()

The previous set of selected elements on the internal jQuery stack.

.map(callback)

The result of the callback function when called on each selected element.