JSFiddle - React, Tailwind, and code Playground

by jt3k

HTML

<div id="progressbar">123</div>

CSS

@keyframes scale-up {
  from {
    background-color: red;
    transform: scaleX(0);
  }
  to {
    background-color: darkred;
    transform: scaleX(1);
  }
}

#progressbar {
	background: red;
	animation: 2.5s linear forwards scale-up;
}