The CSS of Tomorrow

Canvas conference, 7 September 2012. #canvasconf

1. Peter Gasston @stopsatgreen http://broken-links.com
2. The CSS of Tomorrow
3. Predicting the Future “Television won’t last. It’s a flash in the pan.” - Mary Somerville
4. Predicting the Future “Home taping is killing music” - BPI
5. Predicting the Future “There’s no chance that the iPhone is going to get any significant market share. No chance.” - Steve Ballmer, 2007
6. I Predict: Cynicism “That sounds cool but it's useless because we'll have to wait for browsers to catch up.”
7. The CSS of Tomorrow
8. 1.42857142857143 (20 ÷ 14) Relative units
9. Root-relative units html { font-size: 10px; } p { font-size: 1.4em; }←14px p span { font-size: 0.8572em; }←12px 0.85714285714286
11. Root-relative units html { font-size: 10px; } p { font-size: 1.4rem; }←14px p span { font-size: 1.2rem; }←12px Much better. http://www.w3.org/TR/css3-values/
12. Root-relative units E { width: 65%; } F { width: 76.9231%; }←55% of root 76.923076923077%
13. Viewport-relative units 100vw 100vh
14. Viewport-relative units E { height: 50vh; width: 75vw; }
15. Root-relative units E { width: 65vw; } F { width: 55vw; }←55% of root Pukka. http://www.w3.org/TR/css3-values/
16. Selectors li { color: #00F; } ol li { color: #F00; } ol.foo li { color: #00F; } ol:not(.foo) li { color: #F00; } http://www.w3.org/TR/css3-selectors/
17. Selectors ol span, ul span, p span {} *:matches(ol,ul,p) span {} http://www.w3.org/TR/2011/WD-selectors4-20110929/
18. Selectors :link, :visited :any-link :local-link http://www.w3.org/TR/2011/WD-selectors4-20110929/
19. Selectors http://example.com/foo/bar/ <a href="http://example.com/foo/bar/" /> a:local-link {} <a href="http://example.com/" /> a:local-link(0) {} <a href="http://example.com/foo/" /> a:local-link(1) http://www.w3.org/TR/2011/WD-selectors4-20110929/
20. Selectors E /foo/ F <label for="foo" /> <input id="foo" /> label /for/ input {} label:hover /for/ input {} http://www.w3.org/TR/2011/WD-selectors4-20110929/
21. Selectors E! > F !E > F !E! > F E!!1! > F The Parent Selector! http://dev.w3.org/csswg/selectors4/
22. Positioning E { position: sticky; } http://updates.html5rocks.com/2012/08/Stick-your-landings-position-sticky-lands-in- WebKit
23. Media Queries
24. Media Queries @media (script: 0) {} @media (hover) {} @media (pointer: fine|coarse) {} http://dev.w3.org/csswg/mediaqueries4/
25. Media Queries @media screen and (min-width: 400px) {} @media screen and (min-width: 960px) {} @media screen and (resolution: 2dppx) {}
26. Media Queries @media screen { @media (min-width: 400px) {} @media (min-width: 960px) {} @media (resolution: 2dppx) {} } http://my.opera.com/ODIN/blog/2012/08/28/colourful-opera-12-50-snapshot
27. Device Adaptation <meta name="viewport" content="width=device-width,initial- scale=1,maximum-scale=2">
28. Device Adaptation @viewport { initial-scale: 1; maximum-scale: 2; width: device-width; } http://dev.w3.org/csswg/css-device-adapt/
29. Device Adaptation @viewport { initial-scale: 1; width: device-width; } @media (min-width: 800px) { @viewport { maximum-scale: 1; } }
30. Conditionals @document url('http://foo.com/bar/') {} @document url-prefix('http://foo.com/') {} @document domain('foo.com') {} @document regexp('http://foo.com//[a-zA-Z]| \d{3,}/') {} Regular expressions in CSS. Finally! http://www.w3.org/TR/css3-conditional/
31. Conditionals @supports (columns: 3) {} =
32. Images
33. Images E { background-image: image('foo.svg','foo.png',#F00); } E { background-image: url(foo.png); } http://dev.w3.org/csswg/css4-images/
34. Images E { background-image: image-set( 'foo.png' 1x, 'foo-hi.png' 2x, 'foo-mega.png' 600dpi ); }
35. Images E { background-image: image('foo.svg#xywh=0,0,200,60'); }
36. Images #c { background: element(#b); } ‘B’ Actually C A B
37. Images E { background-image: conic-gradient(#F00,#0F0,#00F); }
38. Layout
39. Flexbox
40. .holder { display: flex; } .child { width: 30%; } .child { flex: 1; } A B .a { flex: 2; } .b { flex: 1; } Flexbox http://www.w3.org/TR/css3-flexbox/
41. Flexbox .child { align-items: center; flex: 0; justify-content: center; } C A B .outer { flex-direction: column; } .a,.b { order: 2; } .c { order: 1; }
42. Grid Layout
43. Grid Layout E { display: grid; grid-definition-columns: 1fr 1fr 2fr; } E { grid-definition-columns: 1fr 1fr 2fr; grid-definition-rows: 10em auto 40px; } http://dev.w3.org/csswg/css3-grid-layout/
44. Grid Layout F { grid-column-position: 2; grid-row-position: 2; } A B .a { grid-column: 2 2; } .b { grid-row-span: 3; }
45. Grid Templates E { grid-template: 'head head head' 'nav main main' 'foot foot foot'; } .a { grid-area: 'head'; } .b { grid-area: 'main'; } A B
46. Overflow E { overflow-x: pages; } http://dev.w3.org/csswg/css3-overflow/
47. Overflow E { overflow: fragments; } E::nth-fragment(odd) {} http://dev.w3.org/csswg/css3-break/
48. Regions A .a { flow-into: foo; } B C D .b, .c, .d { flow-from: foo; } B .b { flow-from: foo; } http://dev.w3.org/csswg/css3-regions/
50. Exclusions & Shapes E { position: absolute; } wrap-flow: both; http://dev.w3.org/csswg/css3-exclusions/
51. Exclusions & Shapes E { shape-outside: circle(50%,50%, 400px); } E { shape-inside: circle(50%,50%, 400px); }
52. Filters E { filter: grayscale(1); } https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html
53. Filters E { filter: custom(url(foo.fs)); }
54. Masking E { mask-image: url(foo.png); } + = http://dvcs.w3.org/hg/FXTF/raw-file/tip/masking/index.html
55. Masking E { clip-path: circle(50%,50%,200px); }
56. Pre-processors
57. Cascading Variables :root { var-brand-color: #F00; } h1 { border-color: var(brand-color); color: var(brand-color); } http://dev.w3.org/csswg/css-variables/
58. Cascading Variables Y!$? $title = 'h1 span'; $brandcolor = '#f00'; .foo $title { border-color: $brandcolor; color: $brandcolor; }
59. Hierarchies .foo { border-color: red; } .foo h1 { color: yellow; } .foo h1 em { font-style: normal; } .foo ul { margin: 0; }
60. Hierarchies .foo { border-color: red; & h1 { color: yellow; & em { font-style: normal; } } & ul { margin: 0; } } http://dev.w3.org/csswg/css3-hierarchies/
61. Mixins TBC
62. “When can we use them?” 1. Browser update cycles are getting faster 2. The market share of IE is shrinking
63. “When can we use them?” 1. Your environment 2. How much do you want it?
64. Fin.
65. Image Credits http://www.buzzfeed.com/peggy/22-reasons-why-design-was- more-awesome-in-the-80s http://80s-touch.tumblr.com/ http://theyank.tumblr.com/