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[peachpit] Adaptive Images in Responsive Web Design
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[peachpit] Adaptive Images in Responsive Web Design

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  • 1. @PEACHPIT WEBINAR ADAPTIVE IMAGESIN RESPONSIVE WEB DESIGN CHRISTOPHER SCHMITT @teleject 1
  • 2. CHRISTOPHER SCHMITT @teleject 2
  • 3. @teleject 3
  • 4. @teleject http://nonbreakingspace.tv/ 4
  • 5. @teleject http://cssdevconf.com/ 5
  • 6. @teleject http://artifactconf.com/ 6
  • 7. 7
  • 8. 8
  • 9. 9
  • 10. 10
  • 11. 11
  • 12. y x 12
  • 13. 13
  • 14. 14
  • 15. 15
  • 16. WHY DON’T WE ASK THE BROWSER? (cc) flic.kr/p/vUBHv 16
  • 17. alert("User-agent header sent: " + navigator.userAgent); 17
  • 18. alert("User-agent header sent: " + navigator.userAgent); 18
  • 19. Mozilla/1.0 (Win3.1) http://www.useragentstring.com/ (cc) flic.kr/p/vUBHv 19
  • 20. Mozilla/1.0 (Win3.1) Mozilla/1.22 (compatible; MSIE 2.0; Windows 95) (cc) flic.kr/p/vUBHv http://www.useragentstring.com/ 20
  • 21. Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/ 534.55.3 (KHTML, like Gecko) Version/5.1.5 Safari/534.55.3 (cc) flic.kr/p/vUBHv http://www.useragentstring.com/ 21
  • 22. Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/ 534.55.3 (KHTML, like Gecko) Version/5.1.5 Safari/534.55.3 http://webaim.org/blog/user-agent-string-history/ (cc) flic.kr/p/vUBHv 22
  • 23. http://telejec.tv/12uYOC4 23
  • 24. FEATURE TESTINGvs. BROWSER SNIFFING 1 2 3 24
  • 25. FEATURE TESTINGvs. BROWSER SNIFFING 1 Browser width 2 3 25
  • 26. A scripting approach var myWidth = 0, myHeight = 0; if( typeof( window.innerWidth ) == 'number' ) { //Non-IE myWidth = window.innerWidth; myHeight = window.innerHeight; } else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) { //IE 6+ in 'standards compliant mode' myWidth = document.documentElement.clientWidth; myHeight = document.documentElement.clientHeight; } http://www.howtocreate.co.uk/tutorials/javascript/browserwindow 26
  • 27. The jQuery approach // returns width of browser viewport $(window).width(); // returns height of browser viewport $(window).height(); // returns width of HTML document $(document).width(); // returns height of HTML document $(document).height(); http://api.jquery.com/width/ & http://api.jquery.com/height/ 27
  • 28. CSS media queries // default, mobile-1st CSS 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) { ... } 28
  • 29. (cc) flic.kr/p/8Lo5Gk 29
  • 30. BROWSER WIDTH GIVES US FRAME, NOT THE CANVAS 30
  • 31. FEATURE TESTINGvs. BROWSER SNIFFING 1 Browser width 2 Screen resolution 3 31
  • 32. 72PPIHAS SERVED US WELL (cc) flic.kr/p/6tjjRP 32
  • 33. 72 points-per-inch = 72 pixels-per-inch 33
  • 34. 96PPI IF A WINDOWS USER 34
  • 35. 72 points-per-inch x [1+(1/3)] = 96 PPI 35
  • 36. 78μm goo.gl/zpkFy 78μm “RETINA” DISPLAYS300ppi at 12 inches from the eyes 36
  • 37. 37
  • 38. [In 2013, Intel sees their product line] offer a higher resolution experience than a top-of-the-line 1080p HDTV.” “ http://liliputing.com/2012/04/intel-retina-laptop- desktop-displays-coming-in-2013.html 38
  • 39. 72 PPI 39
  • 40. 240 40
  • 41. 240 PPI 41
  • 42. 240 PPI 42
  • 43. 72 PPI 43
  • 44. 44
  • 45. RETINA DISPLAYS = LARGER IMAGES, LARGER FILE SIZES 45
  • 46. FEATURE TESTINGvs. BROWSER SNIFFING 1 Browser width 2 Screen resolution 3 Bandwidth 46
  • 47. (cc) flic.kr/p/4DziUN SPEED TESTS HINDER SPEED, USER EXPERIENCE 47
  • 48. Testing for speed of an internet connection is like stepping in front of a car to see how fast it is.” “ (cc) flic.kr/p/4DziUN 48
  • 49. Testing for speed of an internet connection is like stepping in front of a car to see how fast it is.” “ But, Christopher, you only have to test it once.”“ (cc) flic.kr/p/4DziUN 49
  • 50. Speed test image https://github.com/adamdbradley/foresight.js 50
  • 51. Speed test image +50k https://github.com/adamdbradley/foresight.js 51
  • 52. Native speed test // @Modernizr's network-connection.js connection = navigator.connection || { type: 0 }, // polyfill isSlowConnection = connection.type == 3 || connection.type == 4 | /^[23]g$/.test(connection.type); http://davidbcalhoun.com/2010/using-navigator-connection-android 52
  • 53. FEATURE TESTINGvs. BROWSER SNIFFING 1 Browser width 2 Screen resolution 3 Bandwidth 53
  • 54. IMGGIMME THAT OLD SCHOOL 1 2 3 54
  • 55. 1 .htaccess 2 3 IMGGIMME THAT OLD SCHOOL 55
  • 56. Filament .htaccess # Responsive Images # Mobile-First images that scale responsively and responsibly # Copyright 2010, Scott Jehl, Filament Group, Inc # Dual licensed under the MIT or GPL Version 2 licenses. # //Start Responsive Images RewriteEngine On # direct image requests to temp RewriteCond %{QUERY_STRING} full=(.*)&? RewriteRule (.*)rwd-router/.*.(jpe?g|png|gif|webp) $1%1 [L] # ignore trap for non-image requests, rewrite URL without trap segment RewriteRule (.*)rwd-router/(.*)$ $1$2 # //End Responsive Images https://github.com/filamentgroup/Responsive-Images 56
  • 57. Filament .htaccess <script src="responsiveimgs.js"></script> <img src="sample-content/running-sml.jpg? full=sample-content/running-lrg.jpg" /> 8+4+ 57
  • 58. ...the server has no way to know what resolution the client’s device is, so it can’t send the appropriately sized embeded images.” “ http://mattwilcox.net/archive/entry/id/1053/ 58
  • 59. http://adaptive-images.com/ 59
  • 60. ADD .HTACCESS, JS, PHP 5, GD lib*, & THEN <IMG> 60
  • 61. 1 .htaccess 2 <picture> and/or srcset 3 GIMME THAT OLD SCHOOL IMG 61
  • 62. media queries in HTML <video controls> <source type="video/mp4" src="video/windowsill_small.mp4" media="all and (max-width: 480px), all and (max-device-width: 480px)"> <source type="video/webm" src="video/windowsill_small.webm" media="all and (max-width: 480px), all and (max-device-width: 480px)"> <source type="video/mp4" src="video/windowsill.mp4"> <source type="video/webm" src="video/windowsill.webm"> <!-- proper fallback content goes here --> </video> http://www.w3.org/community/respimg/2012/03/15/polyfilling- picture-without-the-overhead/ 62
  • 63. <picture> patch <picture alt="A giant stone face at The Bayon temple in Angkor Thom, Cambodia"> <!-- <source src="small.jpg"> --> <source src="small.jpg"> <!-- <source src="medium.jpg" media="(min-width: 400px)"> --> <source src="medium.jpg" media="(min-width: 400px)"> <!-- <source src="large.jpg" media="(min-width: 800px)"> --> <source src="large.jpg" media="(min-width: 800px)"> <!-- Fallback content for non-JS browsers. Same src as the initial source element. --> <noscript><img src="small.jpg" alt="A giant stone face at The Bayon temple in Angkor Thom, Cambodia"></noscript> </picture> http://www.w3.org/community/respimg/2012/03/15/polyfilling- picture-without-the-overhead/ 63
  • 64. ADD IF-ELSE HTML, JS, BORROW <VIDEO>, & THEN <IMG> 64
  • 65. @srcset standard? <h1><img alt="The Breakfast Combo" src="banner.jpeg" srcset="banner-HD.jpeg 2x, banner-phone.jpeg 100w, banner-phone-HD.jpeg 100w 2x"> </h1> http://www.whatwg.org/specs/web-apps/current-work/multipage/ embedded-content-1.html#attr-img-srcset 65
  • 66. https://www.webkit.org/blog/2910/improved-support-for- high-resolution-displays-with-the-srcset-image-attribute/ 66
  • 67. 1 .htaccess 2 <picture> and/or srcset 3 HiSRC GIMME THAT OLD SCHOOL IMG 67
  • 68. Set, forget it HiSRC <script src="https://ajax.googleapis.com/ajax/ libs/jquery/1.7.2/jquery.min.js"></script> <script src="hisrc.js"></script> <script> $(document).ready(function(){ $(".hisrc img").hisrc(); }); </script> https://github.com/teleject/hisrc 68
  • 69. Set, forget it HiSRC <div class="hisrc"> <img src="halloween-mobile-1st.png" data-1x="halloween-x1.png" data-2x="halloween-x2.jpg" alt="Celebrating Halloween in style" /> </div> 69
  • 70. Set, forget it HiSRC <div class="hisrc"> <img src="halloween-mobile-1st.png" data-1x="halloween-x1.png" data-2x="halloween-x2.jpg" alt="Celebrating Halloween in style" /> </div> 70
  • 71. SERIES OF CHECKS TO FIND OUT RESPONSIVE PATH FOR IMAGES... 71
  • 72. DO NATIVE SPEED TEST FOR MOBILE DEVICES FIRST... http://davidbcalhoun.com/2010/using-navigator-connection-android 72
  • 73. $.hisrc.devicePixelRatio = 1; if(window.devicePixelRatio !== undefined) { $.hisrc.devicePixelRatio = window.devicePixelRatio }; Check pixel density... https://gist.github.com/2428356 73
  • 74. +50k https://github.com/adamdbradley/foresight.js Force speed test 74
  • 75. LESS THAN 4G MEANS MOBILE IMAGES LEFT IN PLACE 75
  • 76. BETWEEN 4G & 300 Kbps MEANS REGULAR DESKTOP IMAGES SWAPPED IN 76
  • 77. FAST SPEED & HIGH DENSITY, RETINA IMAGES SWAPPED IN https://github.com/crdeutsch/hisrc/tree/v2 77
  • 78. 2 TRICK PONY 78
  • 79. CSS IS CORE. WE USE CSS MEDIA QUERIES FOR DESIGN 79
  • 80. http://mediaqueri.es/ 80
  • 81. CSS media queries // default, mobile-1st CSS 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) { ... } 81
  • 82. Single pixel GIF 82
  • 83. Single pixel GIF 83
  • 84. Single pixel GIF 84
  • 85. Single pixel GIF 85
  • 86. $.hisrc.defaults = { useTransparentGif: true, http://www.w3.org/community/respimg/2012/04/06/responsive- content-images-using-a-spacer-png-and-background-image/ Single pixel GIF 86
  • 87. $.hisrc.defaults = { useTransparentGif: true, transparentGifSrc: 'http:// example.com/spg.gif', 6+5+9+ 11.6+17+ Single pixel GIF 87
  • 88. $.hisrc.defaults = { useTransparentGif: true, transparentGifSrc: 'data:image/ gif;base64,R0lGODlhAQABAIAAAMz/ AAAAACH5BAEAAAAALAAAAAABAAE AAAICRAEAOw==', 8+5+9+ 11.6+17+ Single pixel GIF 88
  • 89. http://css-tricks.com/which- responsive-images-solution- should-you-use/ 89
  • 90. 24+http://css-tricks.com/which- responsive-images-solution- should-you-use/ 90
  • 91. http://css-tricks.com/which- responsive-images-solution- should-you-use/ ALL SOLUTIONS HAVE 2x HTTP REQUESTS + JAVASCRIPT 91
  • 92. WORKAROUNDSTRICKS in CONTEXT 1 2 3 & (cc) flic.kr/p/64fGf6 92
  • 93. WORKAROUNDSTRICKS 1 background-size: 100% 2 3 & (cc) flic.kr/p/64fGf6 93
  • 94. http://fittextjs.com/ 94
  • 95. background-size: 100% <a href="example.com/link">Download on Github</a> .download a { padding: .095em .8em; background: url(../img/arrow.png) no-repeat; background-size: 100%; margin-left: .4em; -webkit-transition: margin 0.15s ease-out; -moz-transition: margin 0.15s ease-out; text-decoration: none; } 9+5+9+ 11.6+17+ 95
  • 96. WORKAROUNDSTRICKS in CONTEXT 1 background-size: auto 2 SVG 3 & (cc) flic.kr/p/64fGf6 96
  • 97. SVG 97
  • 98. 98
  • 99. 99
  • 100. Native SVG http://caniuse.com/#search=SVG%20in%20HTML%20img%20element 100
  • 101. PNG 16kb SVG 7kb 9+5+9+ 11.6+17+ 101
  • 102. http://petercollingridge.appspot.com/svg-optimiser 102
  • 103. https://github.com/svg/svgo-gui 103
  • 104. https://github.com/svg/svgo-gui 104
  • 105. Modernizr check if(!Modernizr.svg){ var images = document.getElementsByTagName("img"); for(var i = 0; i < images.length; i++){ var src = images[i].src.split("."); images[i].src = src[0] + ".png"; } } http://stackoverflow.com/questions/12846852/ svg-png-extension-switch 105
  • 106. WORKAROUNDSTRICKS in CONTEXT 1 background-size: auto 2 SVG (Clown Car) 3 & (cc) flic.kr/p/64fGf6 106
  • 107. WORKAROUNDSTRICKS in CONTEXT 1 background-size: auto 2 SVG 3 font-based solutions & (cc) flic.kr/p/64fGf6 107
  • 108. ...if you use <meta charset="utf-8"> (you should be for HTML5), you’re adding common Unicode characters like and ✆, and you don’t need a specific font’s version... just copy and paste them into your HTML.” “ 108
  • 109. 109
  • 110. 110
  • 111. 111
  • 112. Font-based RWD http://ilovetypography.com/2012/04/11/designing-type-systems/ 112
  • 113. Font-based RWD http://ilovetypography.com/2012/04/11/designing-type-systems/ avg file size 40kb/per font 113
  • 114. http://css-tricks.com/examples/IconFont/ 114
  • 115. http://fontello.com/ 115
  • 116. http://icomoon.io 116
  • 117. Font-based icons <style> [data-icon]:before { font-family: 'icon-font'; content: attr(data-icon); } </style> <a href="http://example.com/cloud/save/"> <span data-icon="C" aria-hidden="true"></span> Save to Cloud </a> 117
  • 118. WORKAROUNDSTRICKS in CONTEXT 1 background-size: 100% 2 SVG 3 font-based solutions & (cc) flic.kr/p/64fGf6 4 compressed JPEGs 118
  • 119. 119
  • 120. 120
  • 121. 121
  • 122. 122
  • 123. iCloud iOS 5 OSX Lion iPad 2 iPhone OS The world’s most advanced desktop operating system advances even further. With over 250 new features including Multi-Touch gestures, Mission Control, full-screen apps, and Launchpad, OS X Lion takes the Mac further than ever. Learn More X Lion 123
  • 124. iCloud iOS 5 OSX Lion iPad 2 iPhone OS The world’s most advanced desktop operating system advances even further. With over 250 new features including Multi-Touch gestures, Mission Control, full-screen apps, and Launchpad, OS X Lion takes the Mac further than ever. Learn More X Lion ! " ← ↑ 124
  • 125. iCloud iOS 5 OSX Lion iPad 2 iPhone OS The world’s most advanced desktop operating system advances even further. With over 250 new features including Multi-Touch gestures, Mission Control, full-screen apps, and Launchpad, OS X Lion takes the Mac further than ever. Learn More X Lion ! ↙ " ← ← ↗ ↑ ↖ ↑ ↖ 125
  • 126. iCloud iOS 5 OSX Lion iPad 2 iPhone OS The world’s most advanced desktop operating system advances even further. With over 250 new features including Multi-Touch gestures, Mission Control, full-screen apps, and Launchpad, OS X Lion takes the Mac further than ever. Learn More X Lion ↑ ↗ ← " " ↙ ! ↘ ! ↘ 126
  • 127. (cc) flic.kr/p/64fGf6 127
  • 128. 128
  • 129. 446kb < 8,755.2kb (cc) flic.kr/p/64fGf6 0% vs 100% 129
  • 130. Size Type Dimensions Display Px Density File Size Extreme 2276x1400 1x & 2x 446kb Extra Large 1024x1536 2x 1,745kb Extra Large 512x768 1x 503kb Large 640x960 2x 746kb Large 320x480 1x 223kb Medium 500x750 2x 485kb Medium 250x375 1x 145kb 130
  • 131. Size Type Dimensions Display Px Density File Size Extreme 2276x1400 1x & 2x 446kb Extra Large 1024x1536 2x 1,745kb Extra Large 512x768 1x 503kb Large 640x960 2x 746kb Large 320x480 1x 223kb Medium 500x750 2x 485kb Medium 250x375 1x 145kb 131
  • 132. <picture> Patch <picture alt="A giant stone face at The Bayon temple in Angkor Thom, Cambodia"> <!-- <source src="small.jpg"> --> <source src="small.jpg"> <!-- <source src="medium.jpg" media="(min-width: 400px)"> --> <source src="medium.jpg" media="(min-width: 400px)"> <!-- <source src="large.jpg" media="(min-width: 800px)"> --> <source src="large.jpg" media="(min-width: 800px)"> <!-- Fallback content for non-JS browsers. Same src as the initial source element. --> <noscript><img src="small.jpg" alt="A giant stone face at The Bayon temple in Angkor Thom, Cambodia"></noscript> </picture> http://www.w3.org/community/respimg/2012/03/15/polyfilling- picture-without-the-overhead/ 132
  • 133. <img src="rock-climber.jpg" alt="" /> One Image, One IMG 133
  • 134. (cc) flic.kr/p/64fGf6 EXTREMELYCOMPRESSED PROBLEMS 134
  • 135. 135
  • 136. 136
  • 137. 137
  • 138. Clown Car SVG <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 329" preserveAspectRatio="xMidYMid meet"> <title>Clown Car Technique</title> <style> svg { background-size: 100% 100%; background-repeat: no-repeat; } @media screen and (max-width: 400px) { svg {background-image: url(images/small.png");} } @media screen and (min-width: 401px) and (max-width: 700px) { svg {background-image: url(images/medium.png);} } @media screen and (min-width: 701px) and (max-width: 1000px) { svg {background-image: url(images/big.png);} } @media screen and (min-width: 1001px) { svg {background-image: url(images/huge.png);} } </style> </svg> https://github.com/estelle/clowncar 138
  • 139. Clown Car SVG <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 329" preserveAspectRatio="xMidYMid meet"> <title>Clown Car Technique</title> <style> svg { background-size: 100% 100%; background-repeat: no-repeat; } @media screen and (max-width: 400px) { svg {background-image: url(images/small.png");} } @media screen and (min-width: 401px) and (max-width: 700px) { svg {background-image: url(images/medium.png);} } @media screen and (min-width: 701px) and (max-width: 1000px) { svg {background-image: url(images/big.png);} } @media screen and (min-width: 1001px) { svg {background-image: url(images/huge.png);} } </style> </svg> https://github.com/estelle/clowncar 139
  • 140. 140
  • 141. http://coding.smashingmagazine.com/2013/06/02/clown- car-technique-solving-for-adaptive-images-in-responsive- web-design/ 141
  • 142. <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 375 231" preserveAspectRatio="xMidYMid meet" tabindex="-1" aria-label="the aria label is being read" role="img" title="the title attribute of the SVG is being read"> <title>Clown Car Technique</title> <style> </style> </svg> http://codepen.io/teleject/pen/KlzBe Combo Move: SVG 142
  • 143. <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 375 231" preserveAspectRatio="xMidYMid meet" tabindex="-1" aria-label="the aria label is being read" role="img" title="the title attribute of the SVG is being read"> <title>Clown Car Technique</title> <style> </style> <foreignObject> <!--[if lte IE 8]> <img src="../images/mobile-first.png" width="375" height="231" alt="put alt attribute text here"/> <![endif]--> </foreignObject> </svg> http://codepen.io/teleject/pen/KlzBe 143
  • 144. svg { background-size: 100% 100%; background-repeat: no-repeat; } http://codepen.io/teleject/pen/KlzBe Combo Move: SVG 144
  • 145. svg { background-size: 100% 100%; background-repeat: no-repeat; } @media screen and (max-width: 400px) { svg { background-image: url("http://s.cdpn.io/168/pic-Medium-375x231- @1x-72ppi.jpg"); outline: green solid 5px; } } http://codepen.io/teleject/pen/KlzBe Combo Move: SVG 145
  • 146. @media screen and (min-width: 401px), screen and (max-width: 800px) and (-webkit-min-device-pixel-ratio: 1.75) { svg { background-image: url("http://s.cdpn.io/168/pic- Extreme-2276x1400-72ppi.jpg"); outline: red solid 5px; } } http://codepen.io/teleject/pen/KlzBe Combo Move: Compressed JPEG 146
  • 147. @media screen and (max-width: 400px) { svg { width: 375px; height: 231px; } } @media screen and (min-width: 401px) { svg { width: 750px; height: 462px; } } svg { outline: 5px solid black; } http://codepen.io/teleject/pen/KlzBe Combo Move: CSS 147
  • 148. http://codepen.io/teleject/pen/KlzBe 148
  • 149. http://codepen.io/teleject/pen/KlzBe 149
  • 150. http://codepen.io/teleject/pen/KlzBe 150
  • 151. COMBO MOVEDON’T BLAME THE PLAYER 1 2 3 No additional HTTP request1 # of images = 2 No JavaScript http://codepen.io/teleject/pen/KlzBe 151
  • 152. 152
  • 153. 153
  • 154. IMGGIMME THAT NEW SCHOOL 1 2 3 #rwdimg 154
  • 155. IMGGIMME THAT NEW SCHOOL 1 2 3 simple design for users #rwdimg 1 155
  • 156. IMGGIMME THAT NEW SCHOOL 1 2 3 simple design for users browser, server handshake #rwdimg 2 156
  • 157. IMGGIMME THAT NEW SCHOOL 1 2 3 simple design for users browser, server handshake same, several formats #rwdimg 3 157
  • 158. #rwdimg 158
  • 159. #rwdimg 159
  • 160. #rwdimg 160
  • 161. #rwdimg 161
  • 162. #rwdimg 162
  • 163. #rwdimg 163
  • 164. #rwdimg 164
  • 165. #rwdimg <link rel="shortcut icon" href="/assets/favicon.ico" /> Favicon 165
  • 166. #rwdimg <link rel="apple-touch-icon-precomposed" sizes="144x144" href="apple-touch-icon-144x144-precomposed.png" /> <link rel="apple-touch-icon-precomposed" sizes="114x114" href="apple-touch-icon-114x114-precomposed.png" /> <link rel="apple-touch-icon-precomposed" sizes="72x72" href="apple-touch-icon-72x72-precomposed.png" /> <link rel="apple-touch-icon-precomposed" href="apple-touch-icon-precomposed.png" /> Mobile iOS Bookmarks 166
  • 167. #rwdimg 167
  • 168. THANK YOU!CHRISTOPHER SCHMITT @teleject The Non Breaking Space Podcast - http://nonbreakingspace.tv/ 168