JSFiddle - React, Tailwind, and code Playground

HTML

<div id="box">
    Font Bulger!
</div>

CSS

@-webkit-keyframes fontbulger {
        0%, 100% {
                font-size: 70px;
        }
        50% {
                font-size: 20px;
        }
}
#box {
     -webkit-animation: fontbulger 2s infinite;
}