JSFiddle - React, Tailwind, and code Playground

HTML

<img class="avatar" src="http://forum.invisionize.pl/uploads/profile/photo-786.png?_r=1374064732" />

CSS

.avatar {
    transition: all 0.5s;
}

.avatar:hover {
    -webkit-transform: rotate(180deg);
    transform: rotate(180deg);
    transition: all 0.5s;
}