拥抱未来：HTML5 入门指南

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"HTML5介绍" HTML5是一种正在全球范围内被网页开发者广泛接受的新兴标准。这一标准定义了许多新的功能，目前已经被包括微软的Internet Explorer 9在内的主要网络浏览器所支持。在《HTML5：入门》这本电子书中，读者将被引导了解可以立即应用于网站的基本HTML5特性。此内容改编自QuinStreet的HTMLGoodies网站，由David Fiedler和Scott Clark共同贡献。书中的章节涵盖了HTML5的基础知识，旨在帮助开发者理解这一新标准如何改变网页开发的格局。 1. **学习HTML5** 这一部分介绍了开始学习HTML5的基础知识，包括如何开始创建符合HTML5规范的文档，以及它与传统HTML4的不同之处。 2. **HTML4与HTML5的差异** HTML5与HTML4的主要区别在于新引入的元素、APIs和对多媒体的支持。这些变化旨在提高网页的语义性，增强可访问性，并简化开发过程。 3. **HTML5多媒体** HTML5的一个重要进步是内建了对多媒体的支持，使得无需插件即可在网页上嵌入音频和视频。 - **HTML5 Video 元素** 这一章节详细解释了如何使用`<video>`标签来添加和控制视频内容，包括编码格式的选择、播放控制的实现和自定义播放器界面。 - **如何使用Audio标签** `audio`标签的使用方法和视频标签类似，但专注于音频内容的集成，如背景音乐或播客。 4. **HTML5 Canvas元素** HTML5的Canvas API允许开发者在网页上进行动态图形绘制，为游戏、数据可视化和其他交互式应用提供了强大的工具。书中还可能讨论了HTML5对离线存储、表单控件的改进、Web Workers和Web Storage等特性，以及它们如何改善用户体验和开发效率。同时，也可能会提到HTML5在移动设备上的应用，以及浏览器兼容性和渐进增强策略。 HTML5的引入不仅仅是技术层面的变化，它也预示着互联网内容创作和消费方式的革新。尽管在实施过程中可能存在一些挑战，但HTML5的潜力在于它能够提供更加丰富、互动和无障碍的网络体验。对于开发者而言，掌握HTML5的最新特性是保持竞争力的关键。

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HTML5: An Introduction

TML5, depending on who you listen to, may

be either a disruptive new technology that

has the potential to bring entire companies

to their knees, or a smooth transition from

current HTML 4.0 that promises to make life much easier

for developers. Both are at least partially true, and in this

continuing series, I hope to help you make sense out of

HTML5: both business sense and nuts-and-bolts coding-

level sense.

HTML5 is most denitely a work in progress. It began to

take shape back in 2004, and the ofcial specication

may not be actually complete until the year 2022! But

HTML5 is already here, in everything from your current

desktop browser to your new smartphone, so there’s no

problem with getting started.

So Let’s Get Started with HTML5

Perhaps the most important thing to understand about

HTML5 is not the coding details and changes themselves,

but the high-level functions they give you access to. In

fact, HTML5 is all about high-level functions rather than

details. For instance, instead of thinking of multimedia

objects and then dening them as video or audio and so

on, in HTML5 you can simply write something like:

<video src=”watchthis.mp4” width=”640”

height=”480”>

<a href=”watchthis.mp4”>Here’s my video</a>

</video>

This functional methodology extends even to typical

page coding. We’re all used to writing complex pages

in terms of low-level objects like </div>, which is kind

of amorphous and easy to lose track of. So we often

attempt to keep track of things by coding like this:

Web Developer Basics: Learning About HTML5

By David Fiedler and Scott Clark

<H1>Web Developer Basics: Learning About

HTML5</H1>

<p class=”credit”>by David Fiedler</p>

</d iv>

In HTML5, we can cut right to the chase. We’re writing a

header, and now we can code it that way:

<H1>Web Developer Basics: Learning About

HTML5</H1>

<p class=”credit”>by David Fiedler</p>

</header>

So what, you might say at this point. Well, it’s not just the

header of a page that we can now view as a complete

functional object, it’s almost everything we use on a daily

basis: <header>, <footer>, <article>, <section>, <nav>,

<menu>, <gure>. This gives us tremendous exibility

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Jax.Lan

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拥抱未来：HTML5 入门指南

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