* css meaning

.parent {
    background: red;
}
.child {
    overflow: hidden;
    height: 0;
    background: blue;
    -webkit-transition: all .8s ease;
    -moz-transition: all .8s ease;
    -ms-transition: all .8s ease;
    -o-transition: all .8s ease;
    transition: all .8s ease;
    color: white;
}
.parent:hover > .child {
    height: 30px;
    display: block;
}

Source: stackoverflow.com

* css meaning

cascade style sheet

Similar codes

0 vote213 views1 answer
Comentarios en archivo scss
CSS
1 vote244 views2 answers
Selector CSS Example
CSS
3 votes222 views3 answers
Svg animation css
CSS
0 vote215 views1 answer
Css stretch font vertically
CSS
11 votes205 views2 answers
How to center horizontally and vertically block div
CSS
7 votes212 views1 answer
How to use multiple custom fonts in css
CSS
0 vote236 views1 answer
Css display original image in smalle width
CSS
45 votes219 views6 answers
How to write css in html
CSS
3 votes188 views3 answers
Blinking animation css
CSS
17 votes230 views2 answers
Typing test
CSS