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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.
.wrapper-box.u-centercontent
.aspectratio(data-ratio="16:9")
div.u-centercontent
p.u-centertext This text should appear in a green box which has a 16:9 aspect-ratio.<br />The green box itself is contained in a blue box of at least 500px in height.
/*
There's a bug in Firefox where percentage based padding is not calculated correctly for an element wrapped inside a flexboxed element.
Normally percentage based padding is calculated with respect to the width of said element.
In Firefox however, the height of .aspectratio is always 281.25px, which happens to be 56.25% of the *height* of its parent element.
Try toggling the "display: flex" line (used to center the content vertically), and resize your browser window. You'll see.
Related Blog Post: https://www.bram.us/2017/07/30/vertical-marginspaddings-and-flexbox-a-quirky-combination/
Firefox Bug Report: https://bugzilla.mozilla.org/show_bug.cgi?id=1315669
*/
body
background white
width 100%
height 100%
// Utility class to center content using flexbox
.u-centercontent
display flex
align-items center
justify-content center
// Utiltity class to center text
.u-centertext
text-align center
// The wrapper box
.wrapper-box
width 100%
height 500px
// For demo purposes, color me blue
background blue
> .aspectratio
// For demo purposes, color my contained ar box green
background lime
// CSS to create boxes with fixed aspect ratios.
// See https://www.bram.us/2017/06/16/aspect-ratios-in-css-are-a-hack/ for more info
.aspectratio
width 100%
height 0
position relative
&[data-ratio="16:9"]
padding-top: 56.25%;
&[data-ratio="4:3"]
padding-top: 75%;
> *
position absolute
top 0
left 0
width 100%
height 100%
Also see: Tab Triggers