jQuery入门到精通：2010版指南

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"jQuery Novice to Ninja(2010).pdf 是一本由 Earle Castledine 和 Craig Sharkie 合著的 jQuery 入门到高级教程，2010 年出版。本书主要涵盖 jQuery 的核心概念和实用技巧，旨在帮助读者从初学者成长为熟练掌握 jQuery 的专家。书中详细讲解了多个关键主题，包括选择器、元素操作、动画效果、图像与幻灯片、菜单、Ajax 交互、表单处理、列表、树形结构、表格以及插件和高级主题。此外，还提供了参考材料、JavaScript 小贴士和插件助手等内容，附带索引，便于读者查阅和学习。" **jQuery 基础** 1. **Falling in Love with jQuery**: 这一章节介绍了为何选择 jQuery，以及它如何简化 JavaScript 编程，使开发者能够快速地进行网页动态效果和事件处理。 **选择器和元素操作** 2. **Selecting, Decorating, and Enhancing**: jQuery 提供了丰富的选择器用于选取 HTML 元素，如 ID 选择器、类选择器、属性选择器等。此外，还可以使用 jQuery 修改元素样式、添加或删除类，以及增强用户界面。 **动画效果** 3. **Animating, Scrolling, and Resizing**: 这部分讲述了如何使用 jQuery 创建平滑的动画效果，包括改变元素的位置、大小、透明度等。同时，还介绍了滚动和窗口调整大小的处理。 **媒体展示** 4. **Images and Slideshows**: 书中详细阐述了如何利用 jQuery 实现图片轮播和幻灯片展示，包括自动播放、导航按钮和过渡效果的实现。 **用户界面组件** 5. **Menus, Tabs, Tooltips, and Panels**: 讲解了创建动态菜单、选项卡、提示框和面板的方法，这些都是提高网站用户体验的关键。 **Ajax 交互** 6. **Construction, Ajax, and Interactivity**: jQuery 支持异步数据交换（Ajax），使得页面无需刷新即可更新内容。本章涵盖了 AJAX 请求、JSON 解析和动态加载内容。 **表单处理** 7. **Forms, Controls, and Dialogs**: 描述了如何利用 jQuery 处理表单元素，包括验证、提交、模态对话框的创建和自定义控件的构建。 **数据展示** 8. **Lists, Trees, and Tables**: 讨论了如何美化和操作列表、树形结构和表格，提升数据展示的用户体验。 **进阶话题** 9. **Plugins, Themes, and Advanced Topics**: 介绍如何使用和创建 jQuery 插件，以及应用和定制主题。此外，还探讨了一些高级技术，如事件委托、性能优化和插件设计模式。 **附录** - **Reference Material**: 提供了 jQuery API 参考，帮助读者查找特定方法和函数。 - **JavaScript Tidbits**: 深入浅出地讲解了 JavaScript 的一些关键概念和技巧。 - **Plugin Helpers**: 为开发者提供编写 jQuery 插件的指导和实用工具。 **版权信息** 本书所有权利归 SitePoint Pty. Ltd. 所有，未经许可，不得复制或传播。《jQuery Novice to Ninja》是一本全面覆盖 jQuery 技术的教程，适合想要掌握这一强大库的前端开发者阅读。通过这本书，读者可以系统地学习并实践 jQuery，从而提升网页开发技能。

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Flags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 373

Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 374

Callbacks and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376

$.support Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376

Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379

Event Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379

Event Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380

DIY Event Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380

Appendix B JavaScript Tidbits . . . . . . . . . . . . . . . . . . . . . . 381

Type Coercion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 381

Equality Operators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 382

Truthiness and Falsiness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383

Appendix C Plugin Helpers . . . . . . . . . . . . . . . . . . . . . . . . . . . 387

Selector and Context . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 387

The jQuery Stack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388

Minification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 389

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393

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Preface

No matter what kind of ninja you are—a cooking ninja, a corporate lawyer ninja, or

an actual ninja ninja—virtuosity lies in first mastering the basic tools of the trade.

Once conquered, it’s then up to the full-fledged ninja to apply that knowledge in

creative and inventive ways.

In recent times, jQuery has proven itself to be a simple but powerful tool for taming

and transforming web pages, bending even the most stubborn and aging browsers

to our will. jQuery is a library with two principal purposes: manipulating elements

on a web page, and helping out with Ajax requests. Sure, there are quite a few

commands available to do this—but they’re all consistent and easy to learn. Once

you’ve chained together your first few actions, you’ll be addicted to the jQuery

building blocks, and your friends and family will wish you’d never discovered it!

On top of the core jQuery library is jQuery UI: a set of fine-looking controls and

widgets (such as accordions, tabs, and dialogs), combined with a collection of full-

featured behaviors for implementing controls of your own. jQuery UI lets you quickly

throw together awesome interfaces with little effort, and serves as a great example

of what you can achieve with a little jQuery know-how.

At its core, jQuery is a tool to help us improve the usability of our sites and create

a better user experience. Usability refers to the study of the principles behind an

object’s perceived efficiency or elegance. Far from being merely flashy, trendy design,

jQuery lets us speedily and enjoyably sculpt our pages in ways both subtle and ex-

treme: from finessing a simple sliding panel to implementing a brand-new user in-

teraction you invented in your sleep.

Becoming a ninja isn’t about learning an API inside out and back to front—that’s

just called having a good memory. The real skill and value comes when you can

apply your knowledge to making something exceptional: something that builds on

the combined insights of the past to be even slightly better than anything anyone

has done before. This is certainly not easy—but thanks to jQuery, it’s fun just trying.

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Who Should Read This Book

If you’re a front-end web designer looking to add a dash of cool interactivity to your

sites, and you’ve heard all the buzz about jQuery and want to find out what the fuss

is about, this book will put you on the right track. If you’ve dabbled with JavaScript,

but been frustrated by the complexity of many seemingly simple tasks, we’ll show

you how jQuery can help you. Even if you’re familiar with the basics of jQuery, but

you want to take your skills to the next level, you’ll find a wealth of good coding

advice and in-depth knowledge.

You should already have intermediate to advanced HTML and CSS skills, as jQuery

uses CSS-style selectors to zero in on page elements. Some rudimentary programming

knowledge will be helpful to have, as jQuery—despite its clever abstractions—is

still based on JavaScript. That said, we’ve tried to explain any JavaScript concepts

as we use them, so with a little willingness to learn you’ll do fine.

What’s in This Book

By the end of this book, you’ll be able to take your static HTML and CSS web pages

and bring them to life with a bit of jQuery magic. You’ll learn how to select elements

on the page, move them around, remove them entirely, add new ones with Ajax,

animate them … in short, you’ll be able to bend HTML and CSS to your will! We

also cover the powerful functionality of the jQuery UI library.

This book comprises the following nine chapters. Read them in order from beginning

to end to gain a complete understanding of the subject, or skip around if you only

need a refresher on a particular topic.

Chapter 1: Falling in Love with jQuery

Before we dive into learning all the ins and outs of jQuery, we’ll have a quick

look at why you’d want to use it in the first place: why it’s better than writing

your own JavaScript, and why it’s better than the other JavaScript libraries out

there. We’ll brush up on some CSS concepts that are key to understanding

jQuery, and briefly touch on the basic syntax required to call jQuery into action.

Chapter 2: Selecting, Decorating, and Enhancing

Ostensibly, jQuery’s most significant advantage over plain JavaScript is the ease

with which it lets you select elements on the page to play with. We’ll start off

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this chapter by teaching you how to use jQuery’s selectors to zero in on your

target elements, and then we’ll look at how you can use jQuery to alter those

elements’ CSS properties.

Chapter 3: Animating, Scrolling, and Resizing

jQuery excels at animation: whether you’d like to gently slide open a menu, or

send a dialog whizzing across the screen, jQuery can help you out. In this

chapter, we’ll explore jQuery’s wide range of animation helpers, and put them

into practice by enhancing a few simple user interface components. We’ll also

have a quick look at some animation-like helpers for scrolling the page and

making elements resizable.

Chapter 4: Images, Slideshows, and Cross-fading

With the basics well and truly under our belts, we’ll turn to building some of

the most common jQuery widgets out there: image galleries and slideshows.

We’ll learn how to build lightbox displays, scrolling thumbnail galleries, cross-

fading galleries, and even take a stab at an iPhoto-style flip-book.

Chapter 5: Menus, Tabs, Tooltips, and Panels

Now that we’re comfortable with building cool UI widgets with jQuery, we’ll

dive into some slightly more sophisticated controls: drop-down and accordion-

style menus, tabbed interfaces, tooltips, and various types of content panels.

We’re really on a roll now: our sites are looking less and less like the brochure-

style pages of the nineties, and more and more like the Rich Internet Applications

of the twenty-first century!

Chapter 6: Construction, Ajax, and Interactivity

This is the one you’ve all been waiting for: Ajax! In order to make truly desktop-

style applications on the Web, you need to be able to pass data back and forth

to and from the server, without any of those pesky refreshes clearing your inter-

face from the screen—and that’s what Ajax is all about. jQuery includes a raft

of convenient methods for handling Ajax requests in a simple, cross-browser

manner, letting you leave work with a smile on your face. But before we get too

carried away—our code is growing more complex, so we’d better take a look at

some best practices for organizing it. All this and more, in Chapter 6.

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Chapter 7: Forms, Controls, and Dialogs

The bane of every designer, forms are nonetheless a pivotal cornerstone of any

web application. In this chapter, we’ll learn what jQuery has to offer us in terms

of simplifying our form-related scripting. We’ll learn how to validate forms on

the fly, offer assistance to our users, and manipulate checkboxes, radio buttons,

and select lists with ease. Then we’ll have a look at some less conventional

ways of allowing a site’s users to interact with it: a variety of advanced controls

like date pickers, sliders, and drag and drop. We’ll round it off with a look at

modal dialogs in the post-popup world, as well as a few original nonmodal

notification styles. What a chapter!

Chapter 8: Lists, Trees, and Tables

No matter how “Web 2.0” your application may be, chances are you’ll still need

to fall back on the everyday list, the humdrum tree, or even the oft-derided table

to present information to your users. This chapter shows how jQuery can make

even the boring stuff fun, as we’ll learn how to turn lists into dynamic, sortable

data, and transform tables into data grids with sophisticated functionality.

Chapter 9: Plugins, Themes, and Advanced Topics

jQuery is more than just cool DOM manipulation, easy Ajax requests, and funky

UI components. It has a wealth of functionality aimed at the more ninja-level

developer: a fantastic plugin architecture, a highly extensible and flexible core,

customizable events, and a whole lot more. In this chapter, we’ll also cover the

jQuery UI theme system, which lets you easily tailor the appearance of jQuery

UI widgets to suit your site, and even make your own plugins skinnable with

themes.

Where to Find Help

jQuery is under active development, so chances are good that, by the time you read

this, some minor detail or other of these technologies will have changed from what’s

described in this book. Thankfully, SitePoint has a thriving community of JavaScript

and jQuery developers ready and waiting to help you out if you run into trouble.

We also maintain a list of known errata for this book, which you can consult for the

latest updates; the details are below.

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