transform rotateX
by Wang Peng
HTML
<img class="rotateX" src="http://www.chedanji.com/content/images/2015/05/zhuyin.jpg" alt="">
CSS
.rotateX {
-webkit-transition: -webkit-transform 1s ease-in-out;
transition: transform 1s ease-in-out;
}
.rotateX:hover {
-webkit-transform: rotateX(180deg);
transform: rotateX(180deg);
}