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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <base href="https://docraptor.com/"> | |
| <title>Five Things You Should Know About HTML5 - Dive Into HTML5</title> | |
| <link rel="stylesheet" href="/samples/diveintohtml5.screen.css"> | |
| <style> | |
| h1:before { | |
| content: "Introduction:" | |
| } | |
| h2 { | |
| text-align: left; | |
| text-transform: inherit | |
| } | |
| @page { | |
| margin-top: 20px; | |
| @top { | |
| /* header with counter functions to insert page counters */ | |
| content: "Page " counter(page) " of " counter(pages) " pages " | |
| } | |
| } | |
| #toc li a::after {content: " | Page " target-counter(attr(href), page);} | |
| </style> | |
| <link rel="stylesheet" media="only screen and (max-device-width: 480px)" href="/samples/diveintohtml5.mobile.css"> | |
| </head> | |
| <body> | |
| <h1>Testing</h1> | |
| <div id="toc"> | |
| <h3>Table of Contents</h3> | |
| <ul> | |
| <li><a href="#one">One</a></li> | |
| <li><a href="#two">Two</a></li> | |
| <li><a href="#three">Three</a></li> | |
| <li><a href="#four">Four</a></li> | |
| </ul> | |
| </div> | |
| <p>You are here: <a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/index.html">Home</a> | |
| <span class="u triangularBullet"></span> <a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/table-of-contents.html#introduction">Dive | |
| Into <abbr>HTML5</abbr></a> <span class="u triangularBullet"></span> | |
| <h1><br>Five Things You Should Know About HTML5</h1> | |
| <p id="toc"> | |
| <p class="a rotatedFloralHeartBullet"> | |
| <h2 id="one">1. It’s not one big thing</h2> | |
| </p> | |
| <p style="float:right;margin:0 0 1.75em 1.75em"><img src="http://diveintohtml5.info/i/video.png" alt="[mock video player]" | |
| width="226" height="166"></p> | |
| <p>You may well ask: “How can I start using <abbr>HTML5</abbr> if older browsers don’t support | |
| it?” But the question itself is misleading. <abbr>HTML5</abbr> is not one big thing; it is a | |
| collection of individual features. So you can’t detect “<abbr>HTML5</abbr> support,” | |
| because that doesn’t make any sense. But you <em>can</em> detect support for individual features, | |
| like canvas, video, or geolocation.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p>You may think of <abbr>HTML</abbr> as tags and angle brackets. That’s an important part of it, but | |
| it’s not the whole story. The <abbr>HTML5</abbr> specification also defines how those angle | |
| brackets interact with JavaScript, through the Document Object Model (<abbr>DOM</abbr>). <abbr>HTML5</abbr> | |
| doesn’t just define a <code><video></code> tag; there is also a corresponding <abbr>DOM</abbr> | |
| <abbr>API</abbr> for video objects in the <abbr>DOM</abbr>. You can use this <abbr>API</abbr> to detect | |
| support for different video formats, play a video, pause, mute audio, track how much of the video has | |
| been downloaded, and everything else you need to build a rich user experience around the <code><video></code> | |
| tag itself.</p> | |
| <p><a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/detect.html">Chapter 2</a> | |
| and <a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/everything.html">Appendix | |
| A</a> will teach you how to properly detect support for each new <abbr>HTML5</abbr> feature. | |
| <h2 id="two">2. You don’t need to throw anything away</h2> | |
| <p style="float:left;margin:0 1.75em 1.75em 0"><img src="http://diveintohtml5.info/i/forms.png" alt="[sample form controls]" | |
| width="134" height="196"> | |
| <p>Love it or hate it, you can’t deny that <abbr>HTML</abbr> 4 is the most successful markup | |
| format ever. <abbr>HTML5</abbr> builds on that success. You don’t need to throw away your | |
| existing markup. You don’t need to relearn things you already know. If your web | |
| application worked yesterday in <abbr>HTML</abbr> 4, it will still work today in <abbr>HTML5</abbr>. | |
| Period. | |
| <p>Now, if you want to <em>improve</em> your web applications, you’ve come to the right | |
| place. Here’s a concrete example: <abbr>HTML5</abbr> supports all the form controls | |
| from <abbr>HTML</abbr> 4, but it also includes new input controls. Some of these are | |
| long-overdue additions like sliders and date pickers; others are more subtle. For example, | |
| the <code>email</code> input type looks just like a text box, but mobile browsers will | |
| customize their onscreen keyboard to make it easier to type email addresses. Older browsers | |
| that don’t support the <code>email</code> input type will treat it as a regular text | |
| field, and the form still works with no markup changes or scripting hacks. This means you | |
| can start improving your web forms <em>today</em>, even if some of your visitors are stuck | |
| on IE 6. | |
| <p>Read all the gory details about <abbr>HTML5</abbr> forms in <a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/forms.html">Chapter | |
| 9</a>. | |
| <h2 id="three">3. It’s easy to get started</h2> | |
| <p style="float:right;margin:0 0 1.75em 1.75em"><img src="http://diveintohtml5.info/i/markup-with-arrow.png" | |
| alt="[sample HTML markup]" width="234" height="202"> | |
| <p>“Upgrading” to <abbr>HTML5</abbr> can be as simple as changing your | |
| <i>doctype</i>. The doctype should already be on the first line of every <abbr>HTML</abbr> | |
| page. Previous versions of <abbr>HTML</abbr> defined a lot of doctypes, and | |
| choosing the right one could be tricky. In <abbr>HTML5</abbr>, there is only | |
| one doctype: | |
| <blockquote> | |
| <p><code><!DOCTYPE html></code> | |
| </blockquote> | |
| <p>Upgrading to the <abbr>HTML5</abbr> doctype won’t break your existing | |
| markup, because <a rel="external" href="http://www.w3.org/TR/html5-diff/#absent-elements" | |
| target="_blank">obsolete elements</a> previously defined in HTML 4 will | |
| still render in <abbr>HTML5</abbr>. But it will allow you to use — | |
| and validate — new semantic elements like <code><article></code>, | |
| <code><section></code>, <code><header></code>, and <code><footer></code>. | |
| You’ll learn all about these new elements in <a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/semantics.html">Chapter | |
| 3</a>. | |
| <h2 id="four">4. It already works</h2> | |
| <p style="float:left;margin:0 1.75em 1.75em 0"><img src="http://diveintohtml5.info/i/rel-email.png" | |
| alt="[form field with onscreen keyboard]" width="227" height="192"> | |
| <p>Whether you want to draw on a canvas, play video, design better | |
| forms, or build web applications that work offline, you’ll | |
| find that <abbr>HTML5</abbr> is already well-supported. Firefox, | |
| Safari, Chrome, Opera, and mobile browsers already support canvas (<a | |
| href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/canvas.html">Chapter | |
| 4</a>), video (<a href="http://diveintohtml5.info/video.html">Chapter | |
| 5</a>), geolocation (<a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/geolocation.html">Chapter | |
| 6</a>), local storage (<a href="http://diveintohtml5.info/storage.html">Chapter | |
| 7</a>), and more. Google already supports microdata annotations | |
| (<a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/extensibility.html">Chapter | |
| 10</a>). Even Microsoft — rarely known for blazing the | |
| trail of standards support — supports most <abbr>HTML5</abbr> | |
| features in Internet Explorer 9. | |
| <p style="float:right;margin:0 0 1.75em 1.75em"><img src="http://diveintohtml5.info/i/gears.png" | |
| alt="[Gears saying "I can help"]" width="125" | |
| height="75"> | |
| <p>Each chapter of this book includes the all-too-familiar | |
| browser compatibility charts. But more importantly, each | |
| chapter includes a frank discussion of your options if you | |
| need to support older browsers. <abbr>HTML5</abbr> features | |
| like geolocation (<a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/geolocation.html">Chapter | |
| 6</a>) and video (<a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/video.html">Chapter | |
| 5</a>) were first provided by browser plugins like | |
| Gears or Flash. Other features, like canvas (<a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/canvas.html">Chapter | |
| 4</a>), can be emulated entirely in JavaScript. This | |
| book will teach you how to target the native features of | |
| modern browsers, without leaving older browsers behind. | |
| <h2 id="five">5. It’s here to stay</h2> | |
| <p>Tim Berners-Lee invented the world wide web in the early | |
| 1990s. He later founded the <abbr>W3C</abbr> to act as | |
| a steward of web standards, which the organization has | |
| done for more than 15 years. Here is what the <abbr>W3C</abbr> | |
| had to say about the future of web standards, in July | |
| 2009: | |
| <blockquote cite="http://www.w3.org/News/2009#item119"> | |
| <p>Today the Director announces that when the <abbr>XHTML</abbr> | |
| 2 Working Group charter expires as scheduled at | |
| the end of 2009, the charter will not be | |
| renewed. By doing so, and by increasing | |
| resources in the <abbr>HTML</abbr> Working | |
| Group, <abbr>W3C</abbr> hopes to accelerate the | |
| progress of <abbr>HTML5</abbr> and clarify | |
| <abbr>W3C</abbr>’s position regarding the | |
| future of <abbr>HTML</abbr>. | |
| </blockquote> | |
| <p><abbr>HTML5</abbr> is here to stay. <a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/past.html">Let’s | |
| dive in</a>. | |
| <p class="a rotatedFloralHeartBullet"> | |
| <div class="pf"> | |
| <h4>Did You Know?</h4> | |
| <div class="moneybags"> | |
| <blockquote> | |
| <p>In association with Google | |
| Press, O’Reilly is | |
| distributing this book in a | |
| variety of formats, including | |
| paper, ePub, Mobi, and <abbr>DRM</abbr>-free | |
| <abbr>PDF</abbr>. The paid | |
| edition is called “HTML5: | |
| Up & Running,” and it | |
| is available now. | |
| <p>If you liked this | |
| introduction and want to | |
| show your appreciation, you | |
| can <a href="http://diveintohtml5.info/http://www.amazon.com/HTML5-Up-Running-Mark-Pilgrim/dp/0596806027?ie=UTF8&tag=diveintomark-20&creativeASIN=0596806027">buy | |
| “HTML5: Up & | |
| Running” with | |
| this affiliate link</a> | |
| or <a href="http://diveintohtml5.info/http://oreilly.com/catalog/9780596806033">buy | |
| an electronic edition | |
| directly from | |
| O’Reilly</a>. | |
| You’ll get a book, | |
| and I’ll get a buck. | |
| I do not currently accept | |
| direct donations. | |
| </blockquote> | |
| </div> | |
| </div> | |
| <p class="c">Copyright MMIX–MMXI <a href="https://web.archive.org/web/20170614100030/http://diveintohtml5.info/about.html">Mark | |
| Pilgrim</a></p> | |
| </body> | |
| </html> |
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