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June 23, 2013 13:06
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A CodePen by Fabrice Weinberg. Direction aware hover pure CSS - Just a little experiment with pseudo elements. Semantic HTML is maintained. No boilerplate elements.
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<h1>Direction aware hover pure CSS</h1> | |
<div class="box"> | |
<div class="box__right">Right → Left</div> | |
<div class="box__left">Left → Right</div> | |
<div class="box__top">Top → Bottom</div> | |
<div class="box__bottom">Bottom → Top</div> | |
<div class="box__center"> | |
Hover from any side | |
</div> | |
</div> | |
<footer>Created by <a href="http://twitter.com/FWeinb" target="_blank">Fabrice Weinberg</a></footer> |
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@import "compass"; | |
.box{ | |
margin: 5em auto; | |
position:relative; | |
width:10em; | |
height:10em; | |
line-height:10em; | |
overflow:hidden; | |
} | |
%box__dir{ | |
position:absolute; | |
width:inherit; | |
height:inherit; | |
text-align:center; | |
line-height:inherit; | |
transition:transform .4s ease; | |
&:before{ | |
position:absolute; | |
content:''; | |
/* | |
* Calculation: | |
* ____a____ | |
* /|\ | | |
* b | \ | | |
* / a \ | | |
* \ | / | | |
* \ | / | | |
* \|/________| | |
* | |
* a^2 = b^2+b^2 | |
* | |
* solve to b: | |
* | |
* a^2 = 2b^2 | /2 | |
* a^2 / 2 = b^2 | sqrt | |
* a / sqrt(2) = b | |
* | |
* Percentage: | |
* a = 100% | |
* 100 / sqrt(2) = 70.71% | |
* ------ | |
*/ | |
width:70.71%; | |
height:70.71%; | |
transform: rotate(45deg); | |
} | |
&:hover{ | |
transform:translateX(0); | |
z-index:1; | |
} | |
&:hover:before{ | |
width:100%; | |
height:100%; | |
transform: none; | |
} | |
} | |
.box__right{ | |
@extend %box__dir; | |
background:blue; | |
transform:translateX(100%); | |
&:before{ | |
right:100%;bottom:0; | |
transform-origin: 100% 100%; | |
} | |
&:hover ~ .box__center{ | |
transform:translateX(-100%); | |
} | |
} | |
.box__left{ | |
@extend %box__dir; | |
background:green; | |
transform:translateX(-100%); | |
&:before{ | |
left:100%; | |
transform-origin: 0 0; | |
} | |
&:hover ~ .box__center{ | |
transform:translateX(100%); | |
} | |
} | |
.box__top{ | |
@extend %box__dir; | |
background:red; | |
transform:translateY(-100%); | |
&:before{ | |
top:100%;right:0; | |
transform-origin:100% 0; | |
} | |
&:hover ~ .box__center{ | |
transform:translateY(100%); | |
} | |
} | |
.box__bottom{ | |
@extend %box__dir; | |
background:yellow; | |
transform:translateY(100%); | |
&:before{ | |
bottom:100%;left:0; | |
transform-origin:0 100%; | |
} | |
&:hover ~ .box__center{ | |
transform:translateY(-100%); | |
} | |
} | |
.box__center{ | |
@extend %box__dir; | |
background:orange; | |
z-index:-1; | |
} | |
/* Some booring css*/ | |
html, | |
body{ | |
height:100%; | |
} | |
body{ | |
font-family:Helvetica, sans-serif; | |
transform:translateZ(0); | |
} | |
h1{ | |
text-align:center; | |
} | |
footer{ | |
text-align:center; | |
font-size:8pt; | |
color:gray; | |
} | |
a{ | |
color:#FF6600; | |
} | |
a:hover{ | |
color:darkorange; | |
} |
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