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Uploaded byChristopher Schmitt
[amigos] HTML5 and CSS3
This document discusses HTML5 and CSS3 and whether they are ready for mainstream use. It provides an overview of the new HTML5 elements like <header>, <nav>, <section>, <article>, <aside>, and <footer>. It also covers HTML5 video and audio capabilities and supporting different video codecs. The document recommends tools for encoding video files into supported formats and discusses using text tracks for basic captioning support.
[amigos] HTML5 and CSS3
- 1. #html5css3 HTML5 and CSS3: Readyfor Prime Time? Christopher Schmitt ChristopherSchmitt.com http://twitter.com/@teleject 1
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- 4. DESIGN 4
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- 23. XHTML Everyone THINGS ARE GOOD else BETWEEN US, XHTML, RIGHT? I MEAN. WE GET ALONG WELL. AND WE BOTH LIKE STUFF. 3 23 23
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- 25. “THE ATTEMPT TOGET THE WORLD TO SWITCH TO XML, INCLUDING QUOTES AROUND ATTRIBUTE VALUES AND SLASHES IN EMPTY TAGS AND NAMESPACES ALL AT ONCE DIDN’T WORK.” SIR TIM BERNERS-LEE 25 25
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- 30. WEB 2.0 30 30
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- 32. BLUEPRINTS VS REALITY http://www.amazon.com/gp/product/0140139966 32 32
- 33. “TAKE CARE OF THE LUXURIES AND THE NECESSITIES WILL TAKE CARE OF THEMSELVES.” FRANK LLOYD WRIGHT 33 33
- 34. BUILDING WITH HTML5 34 34
- 35. PAGE STRUCTURE 35 35
- 36. DIV ID=“header” DIV ID=“nav” DIV ID=“section” DIV ID=“sidecolumn” DIV ID=“article” DIV ID=“footer” 36 36
- 37. <HEADER> <NAV> <SECTION> <ASIDE> <ARTICLE> <FOOTER> 37 37
- 38. ARTICLE VS ASIDEVS SECTION • Molly Holzschlag, Opera standards evangelist, says: • <section> clarifies <div> • <article> 'replaces' <div id="content"> • <aside> 'replaces' <div id="sidebar"> • Chris Mills, Opera browser employee, plays it safe: http://boblet.tumblr.com/post/130610820/html5-structure1 38 38
- 39. WHAT ABOUT THEDIVS? • Marc Grabanski, jQuery and HTML5 guy: • “div has no meaning whatsoever, so there is nothing semantic about divs” • Bruce Lawson, Opera browser employee: • “Likeall semantic questions, it depends on the context. If your only reason for wanting an element is to group stuff for styling, it's a div.” 39 39
- 40. <body> <header> <h1>Heading</h1> </header> <nav> <h3>Site Navigation</h3> <ul>...</ul> </nav> <section> <article> <h3>Weblog Entry</h3> </article> </section> <aside> <p>You are reading "Chocolate Rain", an entry posted on <time datetime="2009-03-05">5 March, 2009</time>, to the <a href="#">Misty collection</a>. See other posts in <a href="#">this collection</a>.</p> </aside> <footer> <p>...</p> </footer> </body> 40 40
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- 45. HTML5 VIDEO 45 45
- 46. <!DOCTYPE html> <html lang="en"> <head> <metacharset="utf-8"> <title>Basic HTML5 Web Document Structure</title> </head> <body> <h1>Video Example</h1> <object width="425" height="344"><param name="movie" value="http:// www.youtube.com/v/4GuKSqAg5xI&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http:// www.youtube.com/v/4GuKSqAg5xI&hl=en&fs=1" type="application/x- shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object> </body> </html> 46 46
- 47. <!DOCTYPE html> <html lang="en"> <head> <metacharset="utf-8"> <title>Basic HTML5 Web Document Structure</title> </head> <body> <h1>Video Example</h1> <video src="html5test.ogg" width="320" height="240" controls poster="html5testvideoposter.jpg"> <a href="html5testvideo.ogg">Download movie</a> </video> </body> </html> 47 47
- 48. HTML5 VIDEO • WIDTH and HEIGHT should be required, IMO, but movie plays anyway based on the values in the video file itself. • Video formats may have their own posterframe. The browser should use that by default unless overridden by valid POSTER attribute value. • Text can be included within VIDEO element to allow user to download video if their browser doesn’t support. • If you want to give users control, use CONTROL attribute. 48 48
- 49. HTML5 VIDEO • Video can start automatically if using the AUTOPLAY=”1” attribute and value. • Spec provides for LOOP, AUTOBUFFER which also take a value of O or 1. • Codecs support... 49 49
- 50. HTML5 VIDEO “It would be helpful for interoperability if all browsers could support the same codecs. However, there are no known codecs that satisfy all the current players: we need a codec that is known to not require per-unit or per-distributor licensing, that is compatible with the open source development model, that is of sufficient quality as to be usable, and that is not an additional submarine patent risk for large companies. This is an ongoing issue and this section will be updated once more information is available.” - http://www.whatwg.org/specs/web-apps/current-work/#video- and-audio-codecs-for-video-elements 50 50
- 51. CODECS • Ogg (or “Vorbis”) • No need to worry about patents • H.264 • Created by the MPEG group • If you have blu-ray disc player, you are using it • WebM •A wrapper for the VP8 video and Ogg audio streams 51 51
- 52. VIDEO CODEC SUPPORT FF3.6+ S Ch5+ Op10.6+ IE9 Ogg Y Y Y H.264 Y Y* Y WebM (W4.02+) (Ch6+) Y 52 52
- 53. http://firefogg.org/ 53 53
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- 55. http://handbrake.fr/ 55 55
- 56. LESSONS LEARNED • UseVLC or Firefogg to encode common movie files types to OGG • H.264 encoding? Use Handbrake • Ifyou are hot to trot for HTML5 Video, like, right now, check out Mark Pilgrim’s tutorial: http://diveintohtml5.org/video.html • Good primer: http://dev.opera.com/articles/view/introduction-html5-video/ 56 56
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- 59. <script> function playPause() { var myVideo = document.getElementsByTagName('video')[0]; if (myVideo.paused) myVideo.play(); else myVideo.pause(); } </script> 59 59
- 60. <input type=button onclick="playPause()"value="Play/Pause" tabindex="0" /> 60 60
- 61. HTML5 VIDEO &CAPTIONS 61 61
- 62. [Captioning] has beenshown to improve reading skills among adults who are non- readers. http://www.ldonline.org/article/35793 62 62
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- 64. QUICK & DIRTY CAPTIONING 64 64
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- 68. SRT FILES • SRTfilesare text files used in video playback; therefore, they do not contain any video data. • Text file containing subtitles used by various video playback programs; supported by DivX, DVD, and other video formats; • Includes the time each subtitle should be displayed followed by the text of the subtitles. • Subtitle files are often named according to the language of the subtitles, i.e. "moviename-eng.srt" for English and "moviename- ger.srt" for German subtitles. 68 68
- 69. TRANSCRIPT-EN.SRT 1 00:00:00,000 --> 00:00:6,000 Allowme to introduce myself My name is Tay It's T-A-Y, T-A-Y to the Z 2 00:00:06,000 --> 00:00:9,000 This is the web and it's gonna murder your TV It was Chocolate Rain 3 00:00:09,500 --> 00:00:11,500 Wrote a song about that history Chocolate Rain 4 00:00:12,000 --> 00:00:15,000 Now I'm paid a hefty hefty fee Chocolate Rain 69 69
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- 71. <video id="myVid" width="400"src="cherry-chocolate- rain.ogv" autobuffer controls> <track src="transcript-en.srt" type="text/srt" language="en" role="textaudesc"></track> <track src="transcript-gr.srt" type="text/srt" language="gr" role="textaudesc"></track> <p>Alternative text...</p> </video> 71 71
- 72. <video id="myVid" width="400"src="cherry-chocolate-rain.ogv" autobuffer controls> <track src="transcript-en.srt" type="text/srt" language="en" role="textaudesc"></track> <track src="transcript-gr.srt" type="text/srt" language="gr" role="textaudesc"></track> <p>Alternative text...</p> </video> 72 72
- 73. BUILDING WITH CSS3 73 73
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- 75. WHERE IS CSS3 COMING? • The specification is divided into different chunks, modules • http://www.w3.org/Style/CSS/current-work • Transformations • Animations • Media Queries • and so on, and so on... • at a glacial pace ever towards yesterday 75 75
- 76. WHERE IS CSS3 COMING? • The specification is divided into different chunks, modules • http://www.w3.org/Style/CSS/current-work • The specification is being written by W3C • http://www.w3.org/Style/CSS/ 76 76
- 77. WHERE IS CSS3 COMING? • The specification is divided into different chunks, modules • http://www.w3.org/Style/CSS/current-work • The specification is being written by W3C • http://www.w3.org/Style/CSS/ • Browservendors (like Firefox, Safari, and Opera) are implementing their own versions of these unfinished standards • IE9 is “bringing the power of PC hardware and Windows” 77 77
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- 79. IMAGE MASKS 79 79
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- 85. TEXT COLUMNS 85 85
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- 88. TEXT COLUMNS #column { -moz-column-gap: 3em; -moz-column-width: 11em; -webkit-column-gap: 3em; -webkit-column-width: 11em; padding: 10px; } 88 88
- 89. TEXT COLUMNS #column { -moz-column-gap: 3em; -moz-column-width: 11em; -moz-column-rule: 1px solid #ccc; -webkit-column-gap: 3em; -webkit-column-width: 11em; -webkit-column-rule: 1px solid #ccc; padding: 10px; } 89 89
- 90. LESSONS LEARNED • Proprietary CSS extensions in Firefox and Safari. • JavaScriptsolution through a jQuery plugin: http://welcome.totheinter.net/2008/07/22/multi-column-layout-with- css-and-jquery/ 90 90
- 91. COMPLEX ANIMATING LINKS 91 91
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- 93. COMPLEX ANIMATED LINKS •Web designer Faruk Ateş’s personal site (see http://farukat.es/) uses the transition property to change the color of the element. • As well as the color, width, box shadow, text shadow, and opacity. 93 93
- 94. COMPLEX ANIMATED LINKS #web20li a { text-shadow: rgba(0,0,0, 0) 1px 1px 2px; -moz-box-shadow: rgba(0,0,0, 0) 2px 2px 2px; -webkit-box-shadow: rgba(0,0,0, 0) 2px 2px 2px; -moz-border-radius-topright: 31px; -moz-border-radius-bottomright: 31px; -webkit-border-top-right-radius: 31px; -webkit-border-bottom-right-radius: 31px; -webkit-transition: background-color .25s ease, color .5s ease, width .2s ease-out, -webkit-box-shadow .25s ease, text-shadow .2s ease, opacity .2s ease; } 94 94
- 95. BUILDING WITH SANITY 95 95
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- 106. WHERE IS HTML &CSS GOING 106
- 107. http://www.alwaysbetonjs.com 107 107
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- 121. // default, mobile-1stCSS rules devices go here @media screen and (min-width: 480px) { ... } @media screen and (min-width: 600px) { ... } @media screen and (min-width: 768px) { ... } @media screen and (min-width: 910px) { ... } 121
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- 133. THANK YOU! Christopher Schmitt schmitt@heatvision.com http://twitter.com/teleject 133 133