I have two divs, one nested inside the other and i wish to shift inner div outside (upwards) of outer div and slide-in it on a hover.
Markup is looking like so:
<div class="body">
<div class="inner">Green is variable-height text which slides in on viewport hover</div>
Blue is a viewport (<body>, visible part of a page), which content should be compressed upon green slide-in
</div>
And (a little pseudo) css:
.body {
background: #aaf;
height: 300px;
width: 300px;
overflow: hidden;
}
.inner, .body:hover .inner {
-webkit-transition:all linear 0.2s;
transition:all linear 0.2s;
}
.inner {
background: #afa;
width: 300px;
margin-top:-some-magic-to-get-this-div-height;
}
.body:hover .inner {
margin-top: 0;
}
And a final result animation i'd like to get, without using fixed height of green div:
Also, this example (with a guessed and hard-coded height value of 2.5em) on jsfiddle to experiment with:
http://jsfiddle.net/n7vyLoh4/20/
It is possible to partially implement what i want, using transitioning max-height instead of transitioning margin-top, the transition of max-height: 0;
-> max-height: 100%;
with overflow: hidden;
set at all times
works, but has two draw-backs:
Here is an illustration:
And fiddle for that:
http://jsfiddle.net/bsd7vnwu/1/
This is the pure css
solution, which means it does not require any scripts, just a browser that support transitions:
.body {
background: #aaf;
height: 300px;
width: 300px;
overflow: hidden;
}
.inner {
-webkit-transition:all cubic-bezier(0,.81,.4,1) 0.5s;
transition:all cubic-bezier(0,.81,.4,1) 0.5s;
}
.inner {
background: #afa;
width: 300px;
position: absolute;
margin-top: -100%;
float: left;
}
.body:hover .inner {
position: relative;
margin-top: 0;
}
And Fiddle is here
I think this is the effect you want. CSS doesn't allow you to get the height of an element to use in calc()
for positioning and margins, so a little JS is needed.
CSS:
.body {
background: #aaf;
height: 300px;
width: 300px;
overflow: hidden;
}
.inner, .body:hover .inner {
-webkit-transition:all linear 0.2s;
transition:all linear 0.2s;
}
.inner {
background: #afa;
width: 300px;
overflow: hidden;
}
.body:hover .inner {
margin-top : 0 !important;
}
JS:
Array.prototype.forEach.call(document.getElementsByClassName('inner'), function (item) {
item.style.marginTop = (item.clientHeight * -1) + 'px';
});
Demo:
http://jsfiddle.net/09tyLr9b/
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