The CSS of Tomorrow (revised)

London Web Standards, October 2012

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. Root-relative units html { font-size: 10px; } p { font-size: 1.4em; }←14px p span { font-size: 0.8572em; }←12px 0.85714285714286
9. 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/
10. Root-relative units E { width: 65%; } F { width: 76.9231%; }←55% of root 76.923076923077%
11. Viewport-relative units 100vw 100vh
12. Root-relative units E { width: 65vw; } F { width: 55vw; }←55% of root Pukka. http://www.w3.org/TR/css3-values/
13. In-/Ex-trinsic Sizing E { width: fill-available; } E { min-height: fit-content; } http://www.w3.org/TR/css3-sizing/
14. Selectors ol span, ul span, p span {} *:matches(ol,ul,p) span {} *:not(ul) span {} http://www.w3.org/TR/2011/WD-selectors4-20110929/
15. Selectors :link, :visited :any-link :local-link http://www.w3.org/TR/2011/WD-selectors4-20110929/
16. Selectors <label for="foo" /> <input id="foo" /> label /for/ input {} label:hover /for/ input {} http://www.w3.org/TR/2011/WD-selectors4-20110929/ an attribute of E the value of which is equal to the id of F E /foo/ F
17. Selectors E! > F !E > F !E! > F E!!1! > F The Parent Selector! http://dev.w3.org/csswg/selectors4/
18. Positioning E { position: sticky; } http://updates.html5rocks.com/2012/08/Stick-your-landings-position-sticky-lands-in- WebKit
19. Media Queries
20. Media Queries @media (script: 0) {} @media (hover) {} @media (pointer: fine|coarse) {} http://dev.w3.org/csswg/mediaqueries4/
21. Media Queries @media screen and (min-width: 400px) {} @media screen and (min-width: 960px) {} @media screen and (resolution: 2dppx) {}
22. 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
23. Device Adaptation <meta name="viewport" content="width=device-width,initial- scale=1,maximum-scale=2">
24. Device Adaptation @viewport { initial-scale: 1; maximum-scale: 2; width: device-width; } http://dev.w3.org/csswg/css-device-adapt/
25. Device Adaptation @viewport { initial-scale: 1; width: device-width; } @media (min-width: 800px) { @viewport { maximum-scale: 1; } }
26. Conditionals @supports (columns: 3) {} =
27. Images
28. Images E { background-image: image('foo.svg','foo.png',#F00); } E { background-image: url(foo.png); } http://dev.w3.org/csswg/css4-images/
29. Images E { background-image: image-set( 'foo.png' 1x, 'foo-hi.png' 2x, 'foo-mega.png' 600dpi ); }
30. Images E { background-image: image('foo.svg#xywh=0,0,200,60'); }
31. Images #c { background: element(#b); } ‘B’ Actually C A B
32. Images E { background-image: conic-gradient(#F00,#0F0,#00F); }
33. Layout
34. Flexbox
35. .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/
36. Flexbox C A B .outer { flex-direction: column; } .a,.b { order: 2; } .c { order: 1; } A B .outer { flex-direction: column; } .a { flex: 2; } .b { flex: 1; }
37. Grid Layout
38. 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/
39. Grid Layout F { grid-column-position: 2; grid-row-position: 2; } A B .a { grid-column: 2 2; } .b { grid-row-span: 3; }
40. Grid Templates E { grid-template: 'head head head' 'nav main main' 'foot foot foot'; } .a { grid-area: 'head'; } .b { grid-area: 'main'; } A B
41. Overflow E { overflow-x: pages; } Overflow http://dev.w3.org/csswg/css3-overflow/
42. Overflow E { overflow: fragments; } E::nth-fragment(odd) {} http://dev.w3.org/csswg/css3-break/ Overflow
43. 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/
45. Exclusions & Shapes E { position: absolute; } wrap-flow: both; http://dev.w3.org/csswg/css3-exclusions/
46. Exclusions & Shapes E { shape-outside: circle(50%,50%, 400px); } E { shape-inside: circle(50%,50%, 400px); }
47. Filters E { filter: grayscale(1); } https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html
48. Filters E { filter: custom(url(foo.fs)); }
49. Masking E { mask-image: url(foo.png); } http://dvcs.w3.org/hg/FXTF/raw-file/tip/masking/index.html + =
50. Masking E { clip-path: circle(50%,50%,200px); }
51. Pre-processors
52. Cascading Variables :root { var-brand-color: #F00; } h1 { border-color: var(brand-color); color: var(brand-color); } http://dev.w3.org/csswg/css-variables/
53. Cascading Variables Y!$? $title = 'h1 span'; $brandcolor = '#f00'; .foo $title { border-color: $brandcolor; color: $brandcolor; }
54. Hierarchies .foo { border-color: red; } .foo h1 { color: yellow; } .foo h1 em { font-style: normal; } .foo ul { margin: 0; }
55. Hierarchies .foo { border-color: red; & h1 { color: yellow; & em { font-style: normal; } } & ul { margin: 0; } } http://dev.w3.org/csswg/css3-hierarchies/
56. Mixins TBC
57. “When can we use them?” 1. Browser update cycles are getting faster 2. The market share of IE is shrinking
58. “When can we use them?” 1. Your environment 2. How much do you want it?
59. Fin.
61. 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/