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
Credits
Foreword
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Multiproperty easing


The showDetails() function almost accomplishes the unfolding effect we set out to achieve, but because the top and left properties are animating at the same rate, it looks more like a sliding effect. We can subtly alter the effect by changing the easing equation to easeInQuart for the top property only, causing the element to follow a curved path rather than a straight one. Remember, however, that using any easing other than swing or linear requires a plugin, such as the effects core of jQuery UI (http://jqueryui.com/).

$member.find('div').css({
  display: 'block',
  left: '-300px',
  top: 0
}).each(function(index) {
  $(this).animate({
    left: 0,
    top: 25 * index
  }, {
    duration: 'slow',
    specialEasing: {
      top: 'easeInQuart'
    }
  });
});

Listing 11.8

The specialEasing option allows us to set a different acceleration curve for each property that is being animated. Any properties that aren't included in the option will use the easing option's equation...