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Our elections app relied on a 16x9 slide layout across all devices, regardless of the size of the actual screen. We wrote some tricky CSS and JavaScript to achieve this.
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html { | |
font-size:1vw; | |
} | |
body { | |
margin:0; | |
} | |
#stack { | |
box-sizing:border-box; | |
-moz-box-sizing:border-box; | |
-webkit-box-sizing:border-box; | |
border:4px dashed black; | |
/*display: inline-block;*/ | |
margin: 0 auto; | |
width: 100rem; | |
height: 56.3rem; | |
} | |
.big { | |
font-size: 10rem; | |
} | |
.little { | |
font-size: 2rem; | |
} | |
.em { | |
background-color: blue; | |
width: 1rem; | |
height: .1rem; | |
} | |
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<html> | |
<head> | |
<link rel="stylesheet" href="app.css"> | |
</head> | |
<body> | |
<div id="baseline"></div> | |
<div id="stack"> | |
<div class="big"> | |
BIG | |
<div class="em"></div> | |
</div> | |
<div class="little">little <div class="em"></div> | |
</div> | |
</div> | |
<script src="//code.jquery.com/jquery-1.11.0.min.js"></script> | |
<script type="text/javascript" src="app.js"></script> | |
</body> |
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The MIT License (MIT) | |
Copyright (c) 2014 NPR | |
Permission is hereby granted, free of charge, to any person obtaining a copy | |
of this software and associated documentation files (the "Software"), to deal | |
in the Software without restriction, including without limitation the rights | |
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
copies of the Software, and to permit persons to whom the Software is | |
furnished to do so, subject to the following conditions: | |
The above copyright notice and this permission notice shall be included in | |
all copies or substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
THE SOFTWARE. |
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var onWindowResize = function(){ | |
var stack = document.getElementById("stack"); | |
var aspect = window.innerWidth / window.innerHeight; | |
if ( aspect > 16/9) { | |
document.documentElement.style.fontSize = ((16/9) / aspect) + 'vw'; | |
} else { | |
document.documentElement.style.fontSize = '1vw'; | |
} | |
} | |
$(window).on('resize', onWindowResize); | |
onWindowResize(); |
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