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The CSS of Tomorrow (revised)
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Peter Gasston
October 22, 2012
Programming
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The CSS of Tomorrow (revised)
London Web Standards, October 2012
Peter Gasston
October 22, 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
Root-relative units html { font-size: 10px; } p { font-size:
1.4em; }←14px p span { font-size: 0.8572em; }←12px 0.85714285714286
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
Root-relative units E { width: 65vw; } F { width:
55vw; }←55% of root Pukka. http://www.w3.org/TR/css3-values/
In-/Ex-trinsic Sizing E { width: fill-available; } E { min-height:
fit-content; } http://www.w3.org/TR/css3-sizing/
Selectors ol span, ul span, p span {} *:matches(ol,ul,p) span
{} *:not(ul) 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 <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
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 @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 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; }
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; } Overflow http://dev.w3.org/csswg/css3-overflow/
Overflow E { overflow: fragments; } E::nth-fragment(odd) {} http://dev.w3.org/csswg/css3-break/ Overflow
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.
None
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/