精通HTML5与JavaScript编程：无水印PDF指南

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"HTML5 Programming with JavaScript For Dummies 是一本英文版的无水印PDF教程，作者为John Paul Mueller。这本书旨在帮助初学者理解和掌握HTML5编程与JavaScript的结合使用。资源可在多种PDF阅读器中正常打开，并声明来源于网络，如涉及侵权可联系发布者或相关平台删除。在亚马逊美国官网可以查询到该书的详细信息。" 在HTML5编程领域，JavaScript是不可或缺的一部分，因为HTML5虽然增强了网页的结构和语义，但动态交互和复杂功能的实现主要依赖于JavaScript。《HTML5 Programming with JavaScript For Dummies》这本书深入浅出地介绍了如何利用这两种技术构建现代网页应用。首先，书中会介绍HTML5的基本元素和结构，包括新的语义标签（如<header>、<nav>、<article>等）以及多媒体支持，如音频和视频元素。理解这些元素对于创建具有更好可访问性和语义性的网页至关重要。接着，它将探讨JavaScript的基础知识，如变量、数据类型、控制流（条件语句和循环）、函数以及事件处理。JavaScript是动态网页的心脏，能够响应用户交互，更新内容，甚至与服务器进行异步通信。然后，书中的重点会转向HTML5的新API，如离线存储（Web Storage）、Canvas绘图、Geolocation定位、WebSocket实时通信等。这些API极大地扩展了JavaScript的能力，使开发者能够创建更丰富的用户体验。此外，书中还会涵盖调试技巧、性能优化和最佳实践，这些都是确保代码质量和用户体验的关键。对于初学者，学习如何有效地调试和优化代码是非常重要的。最后，可能还会讨论到一些现代前端开发工具和框架，如jQuery、AngularJS或React，这些工具可以简化开发流程，提高开发效率。《HTML5 Programming with JavaScript For Dummies》是一本全面的入门指南，适合想要学习或提升HTML5和JavaScript技能的读者。通过阅读本书，读者不仅可以理解这两个技术的基础，还能了解到如何将它们结合起来创建功能强大的网页应用。

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HTML5 Programming with JavaScript For Dummies

xiv

Using a Centralized Data Store ..................................................................377

Creating Mobile-friendly Applications ...................................................... 378

Developing Accessible Applications ......................................................... 378

Building New Application Types ...............................................................379

Thinking More About Users .......................................................................379

Expecting Unexpected Connections .........................................................380

Index ....................................................................... 381

Introduction

ave you people-watched lately? If not, you really should. People-

watching is both fun and educational. At one time, you wouldn’t see

people using computers wherever they went because computers were large,

cumbersome devices that no one wanted to take out of the office. Today, you

have a hard time finding people who aren’t using a computing device of some

sort to perform some task. Developers have an incredible opportunity today

to affect people in every walk of life and in any situation imaginable because

people carry their computing devices with them far and wide to hold every

bit of information they find valuable.

The tools that developers use to create applications must change to reflect

this new reality, and HTML5 and JavaScript are the most appropriate tools

to accomplish the goals developers have today. You can use the combina-

tion of HTML5 and JavaScript to create applications that run on any device

using just about any new browser. HTML5 Programming with JavaScript For

Dummies is your gateway to an incredible new future of development where

you aren’t limited to a specific platform or some vendor’s concept of what

tools you should use to create applications. This book helps you gain the

skills required to create the new sorts of applications that developers have

always wanted to write.

About This Book

HTML5 Programming with JavaScript For Dummies is about possibilities. It

focuses on getting started writing code quickly and efficiently. You see lots

of coding examples, all of which demonstrate principles you need for writing

applications that people want to use today. The latter part of the book actu-

ally shows some application programming techniques you can use directly

in production applications. The method used to accomplish this goal is the

same method that all smart developers use today — borrowing code from

someone else. This book emphasizes the use of templates and libraries to

make your coding experience fun and simple rather than cumbersome and

boring, as it might have been in the past.

Don’t worry about becoming immediately lost in detail. Like every For

Dummies book, this one takes things slowly, and all the examples are

explained thoroughly so that you know precisely how they work. You’ll find

that you advance quickly because this book takes advantage of the best

HTML5 Programming with JavaScript For Dummies

possible techniques that knowledgeable developers use to make their lives

simple. Working with libraries such as jQuery greatly decreases the work you

have to do while simultaneously making the application you create look pro-

fessional, and best of all, work everywhere on every device.

Of course, every developer needs to be aware of at least the basics, and the

introductory chapters of the book do just that — they tell you how things

work under the cover. Sometimes you need this information in order to make

the best use possible of all those third-party offerings. However, as the text

often states, there’s no need to reinvent the wheel. Your JavaScript applica-

tions will look professional because you’re using professionally written code

to develop them. This book shows you how to create some truly impressive

results in an incredibly short timeframe.

What You Don’t Have to Read

Most of the chapters contain some advanced material that will interest only

some readers. When you see one of these specialized topics, feel free to

skip it. Most of this advanced material appears in sidebars. The sidebar title

always indicates the nature of the advanced material.

You can also skip any material marked with a Technical Stuff icon. This mate-

rial is helpful, but you don’t have to know it to work with HTML or JavaScript.

I include this material because I find it helpful in my programming efforts and

believe that you will, too.

Foolish Assumptions

You might find it difficult to believe that I’ve assumed anything about you —

after all, I haven’t even met you yet! Although most assumptions are indeed

foolish, I made these assumptions to provide a starting point for the book.

It’s important that you’re familiar with the platform and browser you want

to use because the book doesn’t provide any handholding in this regard. To

focus on HTML5 and JavaScript as fully as possible, the book covers brows-

ers marginally and platform requirements not at all. You really do need to

know how to install applications, use the browser, and generally work with

your chosen platform before you begin working with this book.

Knowing a little about HTML is helpful but not essential. Any experience you

have with programming will be helpful as well. The book doesn’t assume you

have any knowledge of JavaScript.

Introduction

Conventions Used in This Book

This book uses special typeface to emphasize some information. For exam-

ple, entries that you need to type appear in bold. All code, Website URLs, and

onscreen messages appear in monofont type. When I define a new word,

you see that word in italics.

Because you use multiple applications when you’re working with JavaScript,

I always point out when to move from one application to the next. However,

the testers for this book tried out the code with the Internet Explorer, Firefox,

and Chrome browsers on the Macintosh, Linux, and Windows platforms. One

tester also checked at least some of the code using a Windows 8 phone. In

most cases, you shouldn’t experience any problem working with your appli-

cation unless specifically noted in the application description. Please let me

know at John@JohnMuellerBooks.com if you ever experience a problem

with one of the examples.

How This Book Is Organized

This book contains several parts. Each part demonstrates a particular

JavaScript concept. In each chapter, I discuss a particular topic and include

example programs that you can use to discover more about JavaScript on

your own. It isn’t necessary to read the book cover-to-cover — you can

peruse the topics you find most interesting as you would with any refer-

ence book. However, you’ll get more from the book if you do read it cover-

to-cover. You can find the source code for this book on the Dummies.com

Website at http://www.dummies.com/go/html5programmingwith

javascript.

Part I: Understanding the

Basics of JavaScript

This part of the book helps you gain a perspective of what the language can

do for you as a developer and then shows you some simple examples of

how the language works. Chapter 1 exposes you to JavaScript by presenting

simple examples — you aren’t expected to fully understand how they work,

but you do gain an understanding of what JavaScript is like and how it could

potentially help you create amazing browser-based applications. Chapter 2

spends time exploring some common tools you should consider using when

writing your JavaScript applications. Chapter 3 begins exploring how HTML5

and JavaScript work together to create a useful programming environment.

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精通HTML5与JavaScript编程：无水印PDF指南

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