Responsive Responsive Design Tutorial at Velocity NY

Presented at Velocity NY on October 14, 2013.

Transcript

1. Tim Kadlec @tkadlec 2012 Web Peformance Summit 8/29/2012 Responsive Responsive Design Building sites that are flexible and fast Velocity NY | October 14, 2013
2. — Ethan Marcotte Now more than ever, we’re designing work meant to be viewed along a gradient of different experiences. Responsive web design offers us a way forward, finally allowing us to “design for the ebb and flow of things. http://alistapart.com/article/responsive-web-design
4. — John Allsopp The control which designers know in the print medium, and often desire in the web medium, is simply a function of the limitation of the printed page. We should embrace the fact that the web doesn’t have the same constraints, and design for this flexibility. http://alistapart.com/article/dao
5. More than layout
6. — Ethan Marcotte Now more than ever, we’re designing work meant to be viewed along a gradient of different experiences. Responsive web design offers us a way forward, finally allowing us to “design for the ebb and flow of things. gradient of different experiences http://alistapart.com/article/responsive-web-design
7. — Ethan Marcotte Now more than ever, we’re designing work meant to be viewed along a gradient of different experiences. Responsive web design offers us a way forward, finally allowing us to “design for the ebb and flow of things. gradient of different experiences http://alistapart.com/article/responsive-web-design
8. — Stephanie Rieger Shoot me now…responsive design has seemingly become confused with an opportunity to reduce performance rather than improve it. https://twitter.com/stephanierieger/status/245240465572642816
9. 74 requests, 1511kb 114 requests, 1200kb 99 requests, 1298kb 105 requests, 5942kb
10. http://www.guypo.com/uncategorized/real-world-rwd-performance-take-2/
11. http://www.guypo.com/uncategorized/real-world-rwd-performance-take-2/
12. http://www.guypo.com/uncategorized/real-world-rwd-performance-take-2/
13. Revenue
14. Revenue Traffic Conversions Satisfaction Page views
15. 71% as quickly or faster http://www.gomez.com/resources/whitepapers/survey-report-what-users-want-from-mobile
16. Performance is a fundamental component of the user experience.
17. RWD is bad for performance!!!
19. Blame the implementation, not the technique. http://timkadlec.com/2012/10/blame-the-implementation-not-the-technique/
21. March 2012: 829kb http://www.stevesouders.com/blog/2013/04/05/page-weight-grows-24-year-over-year-not-44/
22. March 2012: 829kb March 2013: 1031kb http://www.stevesouders.com/blog/2013/04/05/page-weight-grows-24-year-over-year-not-44/
23. Performance needs to matter because it matters to users A culture of performance
24. — A friend I doubt anyone really wants to release a site that doesn't perform well, it's just a product of not being afforded the luxury of time and top-down pressure.
25. Set a performance budget
26. Must be usable in <= 10s 65kB - 100kB
27. 1. Optimize
28. 1. Optimize 2. Remove
29. 1. Optimize 2. Remove 3. Don’t Add
30. Become a performance masochist Embrace the pain
31. Get real, early
32. — Brad Frost You can’t mock-up performance in Photoshop.
33. — Brad Frost You can’t mock-up performance in Photoshop.
35. Or: Why I cry myself to sleep at night Responsive Images
37. 61%
39. 66%
40. Trim the fat Compress any and all images
42. 23 images = 633.0 KB Before Compression
43. 23 images = 597.4 KB After Compression
44. 35.6 KB After Compression
45. 11 CSS background images = 525.9 KB Before Compression
46. 11 CSS background images = 317.1 KB After Compression
47. 208.8KB After Compression
48. 244.4 KB After Compression
49. Show Not, Waste Not Don’t download things you don’t need
50. display:none is useless
51. <div id="test1"> <img src="images/test1.png" alt="" /> </div> @media all and (max-width: 600px) { #test1 { display:none; } }
52. Everybody loads it anyway
55. <div class="delayed-image-load" data-src="http://ichef.bbci.co.uk/news/200/ media/images/64664000/jpg/ 64664041_016703869.jpg" data-width="521" data-height="293"></div>
56. <div class="delayed-image-load" data-src="http://ichef.bbci.co.uk/news/200/ media/images/64664000/jpg/ 64664041_016703869.jpg" data-width="521" data-height="293"></div>
57. <div class="delayed-image-load" data-src="http://ichef.bbci.co.uk/news/200/ media/images/64664000/jpg/ 64664041_016703869.jpg" data-width="521" data-height="293"></div>
58. <div class="delayed-image-load" data-src="http://ichef.bbci.co.uk/news/200/ media/images/64664000/jpg/ 64664041_016703869.jpg" data-width="521" data-height="293"></div>
59. The preloader
60. Decorative vs. content
61. Appropriate images Make sure things are the right size and resolution
62. 72%
63. 255 values for red 255 values for green 255 values for blue 255 values for alpha
64. 600px 600px
65. 550px 550px
66. (600 x 600) - (550 x 550) 57,500 pixels
69. <picture width="500" height="500"> <source media="(min-width: 45em)" src="large.jpg"> <source media="(min-width: 18em)" src="med.jpg"> <source src="small.jpg"> <img src="small.jpg" alt=""> <p>Accessible text</p> </picture>
70. <span data-picture data-alt="A giant stone face at The Bayon temple in Angkor Thom, Cambodia"> <span data-src="small.jpg"></span> <span data-src="medium.jpg" data-media="(min-width: 400px)"></span> <span data-src="large.jpg" data-media="(min-width: 800px)"></span> <span data-src="extralarge.jpg" data-media="(min-width: 1000px)"></span> <!-- Fallback content for non-JS browsers. Same img src as the initial, unqualified source element. --> <noscript> <img src="external/imgs/small.jpg" alt="A giant stone face at The Bayon temple in Angkor Thom, Cambodia"> </noscript> </span>
71. <img src="fallback.jpg" alt="" srcset="small.jpg 640w 1x, small-hd.jpg 640w 2x, med.jpg 1x, med-hd.jpg 2x " />
72. <img src="low-res.jpg" alt="" srcset="high-res.jpg 2x">
73. LQIP http://www.guypo.com/feo/introducing-lqip-low-quality-image-placeholders/
74. <img src="dummy.400x300.jpg" alt="Responsive Image" data-fullsrc="dummy.800x600.jpg" />
75. Compressive
76. http://blog.netvlies.nl/design-interactie/retina-revolution/
77. SVG
78. <img src="image.svg" onerror="this.onerror=null; this.src='image.png'">
79. .main-header { background: url(logo.svg) no-repeat top left; background-size: contain; } .no-svg .main-header { background-image: url(logo.png); }
80. 1. Analyze
81. 1. Analyze 2. Big images first
82. (600 x 600) - (550 x 550) 57,500 pixels
83. (200 x 200) - (150 x 150) 17,500 pixels
84. 57,500 / 17,500 = 3.2x
85. 1. Analyze 2. Big images first 3. Know the trade-offs
86. Actually, not so sucky Background images
87. <div id="test3"> <div></div> </div> #test3 div { background-image:url('images/test3.png'); width:200px; height:75px; } @media all and (max-width: 600px) { #test3 { display:none; } }
88. <div id="test5"></div> @media all and (min-width: 601px) { #test5 { background-image:url('images/test5-desktop.png'); width:200px; height:75px; } } @media all and (max-width: 600px) { #test5 { background-image:url('images/test5-mobile.png'); width:200px; height:75px; } }
89. Load only what you need, when you need it Conditional loading
90. 1. Content https://speakerdeck.com/andyhume/anatomy-of-a-responsive-page-load-whiskyweb-ii
91. 1. Content https://speakerdeck.com/andyhume/anatomy-of-a-responsive-page-load-whiskyweb-ii 2. Enhancements
92. 1. Content https://speakerdeck.com/andyhume/anatomy-of-a-responsive-page-load-whiskyweb-ii 2. Enhancements 3. Leftovers
93. Cutting the mustard
94. if ('querySelector' in document ! && 'localStorage' in window ! && 'addEventListener' in window) { }
95. http://bit.ly/RSrWVI
96. http://bit.ly/RSrWVI
97. http://bit.ly/RSrWVI
98. globe.enhanced = ( ! respond.mediaQueriesSupported ! || globe.browser.ie6 ! || globe.browser.ie7 ! || globe.browser.ie8 )
102. <h2> <a data-target="reviews" href="reviews.html">Reviews</a> </h2>
103. anchorInclude : function ( elem ) { var url = elem.getAttribute('href'); var target = document.getElementById( elem.getAttribute('data-target') ); reqwest(url, function (resp) { target.innerHTML = resp; }); }
104. <a href="..." data-replace="articles/latest/fragment">Latest Articles</a> <a href="..." data-before="articles/latest/fragment">Latest Articles</a> <a href="..." data-after="articles/latest/fragment">Latest Articles</a> <a href="..." data-append="articles/latest/fragment">Latest
105. $("[data-append],[data-replace],[data-after], [data-before]").ajaxInclude();
106. No AJAX, no problem
107. <div data-lazy-content="more_puppies" aria- live="polite"> <!-- <p>You clicked for more puppies! Here you go:</p> <img src="puppy.jpg" alt="Lazy loaded puppy image" /> --> </div>
108. var toShow = document.querySelectorAll('[data-lazy-content=' + item.getAttribute('[data-lazy-reveal]') + ']'; for (var j = toShow.length - 1; j >= 0; j--) { ! var children = toShow[j].childNodes; ! for (var k = children.length - 1; k >= 0; k--) { ! ! var child = children[k]; ! ! if (child.nodeType === 8) { ! ! ! //it's a comment ! ! ! toShow[j].innerHTML = child.nodeValue; ! ! ! break; ! ! } ! } }
109. What about CSS?
110. Embedded a { ! text-decoration: none; } @media screen and (min-width: 1300px) { ! a { ! ! text-decoration: underline; ! } }
111. External <link href="style.css" media="only screen and (min-width:
112. Embedded External One HTTP request Many HTTP requests
113. Embedded External One HTTP request Many HTTP requests Large file could be hard to maintain Organization can be easier
114. Embedded External One HTTP request Many HTTP requests Large file could be hard to maintain Organization can be easier Extra weight, regardless of if needed Smaller CSS for device not supporting media queries
115. Embedded External One HTTP request Many HTTP requests Large file could be hard to maintain Organization can be easier Extra weight, regardless of if needed Smaller CSS for device not supporting media queries All styles downloaded All styles downloaded (if media queries supported)
116. http://scottjehl.github.com/CSS-Download-Tests/
117. <link rel="stylesheet" href="style.css" media="seriously please do not download this what is the matter with you why won’t you listen" />
119. Chrome 26 Safari 6.0.2 iOS Safari 6.1 Android 4.2.1 Android 4.2.1 Chrome 18 Android 4.2.1 Chrome 18 Android 4.2.1 Opera Mini Yay!
120. Internet Explorer 10 Internet Explorer 9 Internet Explorer 8 Firefox 20 Opera 12.15 Android 4.2.1 Opera Mobile Nooooo!
121. Embedded External One HTTP request Many HTTP requests Large file could be hard to maintain Organization can be easier Extra weight, regardless of if needed Smaller CSS for device not supporting media queries All styles downloaded All styles downloaded (if media queries supported) Everything is in the critical path Browsers can optimize for the critical path
122. Go vanilla
123. https://twitter.com/ppk/status/249100988693241856
124. https://twitter.com/ppk/status/249100988693241856
125. jQuery = 200-300ms based on 1.8.0 http://jsperf.com/zepto-jq-eval
126. Up to 8s!
127. Custom jQuery builds
128. Everything has a trade-off
130. What value does this provide?
131. Don’t worry about JS library size? Just include one less image?
132. Worry about JS library size and include one less image.
133. Smart defaults
134. RESS
135. If you only knew the power of the Dark Side! RESS
136. This @#$% ain’t easy
137. UA detection is evil!
138. Browsers are like fishermen
142. Blame the implementation, not the technique.
144. 82% of Alexa top 100 sites use some form of server-side detection http://mobiforge.com/designing/blog/server-side-device-detection-used-82-alexa-top-100-sites
145. <?php // instantiate client include 'DeviceAtlasCloud/Client.php'; // fetch props $results = DeviceAtlasCloudClient::getDeviceData(); // store result $props = $results['properties']; // set $width to correct width or "" if unknown $width = (isset($props['displayWidth'])) ? $props['displayWidth'] :""; ?> http://mobile.smashingmagazine.com/2013/10/08/responsive-website-design-with-ress/
146. <img src="slide-01.jpg" width="<?php echo $width; ?>" alt="image description" /> http://mobile.smashingmagazine.com/2013/10/08/responsive-website-design-with-ress/
147. // check network performance require_once 'DeviceAtlasNPC.php'; session_start(); // instantiate NPC $deviceAtlasNPC = new DeviceAtlasNPC(); // test network performance $quality = $deviceAtlasNPC->getQuality(); http://mobile.smashingmagazine.com/2013/10/08/responsive-website-design-with-ress/
148. $path = $_SERVER['SCRIPT_NAME']; switch($quality) { case DeviceAtlasNPC::HIGH_QUALITY: if ($_SERVER['HTTP_HOST'] == 'lo.site.com') { header("Location: http://site.com".$path ); } break; case DeviceAtlasNPC::MEDIUM_QUALITY: if ($_SERVER['HTTP_HOST'] == 'lo.site.com') { header("Location: http://site.com".$path ); } break; case DeviceAtlasNPC::LOW_QUALITY: if ($_SERVER['HTTP_HOST'] == 'site.com') { header("Location: http://lo.site.com".$path ); } break; default: } http://mobile.smashingmagazine.com/2013/10/08/responsive-website-design-with-ress/
149. <?php if ($device->getCapability('has_cellular_radio') === 'true') { ! if ($device->getCapability('xhtml_make_phone_call_string') !== 'none') { ! ! $wireless = true; ! ! $method = $device->getCapability('xhtml_make_phone_call_string'); ! } else { ! ! $wireless = false; ! } } else { ! $wireless = false; } ?>
150. var features = {}; if (Utils.readCookie('features')) { ! features = Utils.readCookie('features'); ! features = JSON.parse(features); } else { ! features['width'] = Utils.tests.getWidth(); ! Utils.createCookie('features', JSON.stringify(features)); }
151. <?php if (isset($_COOKIE['features'])) { ! $feature = json_decode($_COOKIE['features']); } if ($feature->width) { ! $width = $feature->width; } else { ! $width = $device->getCapability('resolution_width'); } ?>
152. Client Hints https://github.com/igrigorik/http-client-hints
153. CH-DPR: 2.00
154. Time to move beyond just visual aesthetics
155. Talk about it
156. This may not be easy...
157. ...but man is it fun!
158. thank you! @tkadlec timkadlec.com TIM KADLEC
159. implementingresponsivedesign.com