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The CSS of Tomorrow
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Peter Gasston
September 07, 2012
Technology
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The CSS of Tomorrow
Canvas conference, 7 September 2012. #canvasconf
Peter Gasston
September 07, 2012
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Transcript
Peter Gasston @stopsatgreen http://broken-links.com
The CSS of Tomorrow
Predicting the Future “Television won’t last. It’s a flash in
the pan.” - Mary Somerville
Predicting the Future “Home taping is killing music” - BPI
Predicting the Future “There’s no chance that the iPhone is
going to get any significant market share. No chance.” - Steve Ballmer, 2007
I Predict: Cynicism “That sounds cool but it's useless because
we'll have to wait for browsers to catch up.”
The CSS of Tomorrow
1.42857142857143 (20 ÷ 14) Relative units
Root-relative units html { font-size: 10px; } p { font-size:
1.4em; }←14px p span { font-size: 0.8572em; }←12px 0.85714285714286
None
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/
Root-relative units E { width: 65%; } F { width:
76.9231%; }←55% of root 76.923076923077%
Viewport-relative units 100vw 100vh
Viewport-relative units E { height: 50vh; width: 75vw; }
Root-relative units E { width: 65vw; } F { width:
55vw; }←55% of root Pukka. http://www.w3.org/TR/css3-values/
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/
Selectors ol span, ul span, p span {} *:matches(ol,ul,p) span
{} http://www.w3.org/TR/2011/WD-selectors4-20110929/
Selectors :link, :visited :any-link :local-link http://www.w3.org/TR/2011/WD-selectors4-20110929/
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/
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/
Selectors E! > F !E > F !E! > F
E!!1! > F The Parent Selector! http://dev.w3.org/csswg/selectors4/
Positioning E { position: sticky; } http://updates.html5rocks.com/2012/08/Stick-your-landings-position-sticky-lands-in- WebKit
Media Queries
Media Queries @media (script: 0) {} @media (hover) {} @media
(pointer: fine|coarse) {} http://dev.w3.org/csswg/mediaqueries4/
Media Queries @media screen and (min-width: 400px) {} @media screen
and (min-width: 960px) {} @media screen and (resolution: 2dppx) {}
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
Device Adaptation <meta name="viewport" content="width=device-width,initial- scale=1,maximum-scale=2">
Device Adaptation @viewport { initial-scale: 1; maximum-scale: 2; width: device-width;
} http://dev.w3.org/csswg/css-device-adapt/
Device Adaptation @viewport { initial-scale: 1; width: device-width; } @media
(min-width: 800px) { @viewport { maximum-scale: 1; } }
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/
Conditionals @supports (columns: 3) {} =
Images
Images E { background-image: image('foo.svg','foo.png',#F00); } E { background-image: url(foo.png);
} http://dev.w3.org/csswg/css4-images/
Images E { background-image: image-set( 'foo.png' 1x, 'foo-hi.png' 2x, 'foo-mega.png'
600dpi ); }
Images E { background-image: image('foo.svg#xywh=0,0,200,60'); }
Images #c { background: element(#b); } ‘B’ Actually C A
B
Images E { background-image: conic-gradient(#F00,#0F0,#00F); }
Layout
Flexbox
.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/
Flexbox .child { align-items: center; flex: 0; justify-content: center; }
C A B .outer { flex-direction: column; } .a,.b { order: 2; } .c { order: 1; }
Grid Layout
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/
Grid Layout F { grid-column-position: 2; grid-row-position: 2; } A
B .a { grid-column: 2 2; } .b { grid-row-span: 3; }
Grid Templates E { grid-template: 'head head head' 'nav main
main' 'foot foot foot'; } .a { grid-area: 'head'; } .b { grid-area: 'main'; } A B
Overflow E { overflow-x: pages; } http://dev.w3.org/csswg/css3-overflow/
Overflow E { overflow: fragments; } E::nth-fragment(odd) {} http://dev.w3.org/csswg/css3-break/
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/
None
Exclusions & Shapes E { position: absolute; } wrap-flow: both;
http://dev.w3.org/csswg/css3-exclusions/
Exclusions & Shapes E { shape-outside: circle(50%,50%, 400px); } E
{ shape-inside: circle(50%,50%, 400px); }
Filters E { filter: grayscale(1); } https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/index.html
Filters E { filter: custom(url(foo.fs)); }
Masking E { mask-image: url(foo.png); } + = http://dvcs.w3.org/hg/FXTF/raw-file/tip/masking/index.html
Masking E { clip-path: circle(50%,50%,200px); }
Pre-processors
Cascading Variables :root { var-brand-color: #F00; } h1 { border-color:
var(brand-color); color: var(brand-color); } http://dev.w3.org/csswg/css-variables/
Cascading Variables Y!$? $title = 'h1 span'; $brandcolor = '#f00';
.foo $title { border-color: $brandcolor; color: $brandcolor; }
Hierarchies .foo { border-color: red; } .foo h1 { color:
yellow; } .foo h1 em { font-style: normal; } .foo ul { margin: 0; }
Hierarchies .foo { border-color: red; & h1 { color: yellow;
& em { font-style: normal; } } & ul { margin: 0; } } http://dev.w3.org/csswg/css3-hierarchies/
Mixins TBC
“When can we use them?” 1. Browser update cycles are
getting faster 2. The market share of IE is shrinking
“When can we use them?” 1. Your environment 2. How
much do you want it?
Fin.
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/