JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://openclipart.org/people/ricardomaia/glossy_blue_button.svg" width="60px" />

CSS

img {
    margin-top:20px;
    transition: margin-top 1s;
    -moz-transition: margin-top 1s; /* Firefox 4 */
    -webkit-transition: margin-top 1s; /* Safari and Chrome */
    -o-transition: margin-top 1s; /* Opera */
}
img:hover {
    margin-top:10px;
    transition: margin-top 1s;
    -moz-transition: margin-top 1s; /* Firefox 4 */
    -webkit-transition: margin-top 1s; /* Safari and Chrome */
    -o-transition: margin-top 1s; /* Opera */
}