JSFiddle - React, Tailwind, and code Playground

by Wagner Souza

HTML

<div id="box">Animate</div>

CSS

#box{
    background: #f9f9f9;
    padding: 1em;
    font: 14px Verdana, sans-serif;
    text-align: center;
    box-shadow: rgba(0,0,0,.3) 0 0 3px;
    border-radius: 3px;
    color: gray;
    margin: 10% auto;
    width: 200px;
    /* anim */
    -webkit-animation: anim 2s infinite;
       -moz-animation: anim 2s infinite;
         -o-animation: anim 2s infinite;
            animation: anim 2s infinite;
}
@keyframes anim{
    0%{
        width: 200px;
    }
    50%{
        width: 500px;   
    }
    100%{
        width: 200px;   
    }
}