JSFiddle - React, Tailwind, and code Playground

by batcave

HTML

<button class="press">press</button>

SCSS

.press {
  position: relative;
  color: red;
  border: none;
  padding: 3rem;
  background-color: transparent;
  
  &::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background-color: currentColor;
    opacity: .5;
    z-index: -1;
  }
}