The CSS of Tomorrow

Transcript

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
10. None

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/
49. None

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/