JSFiddle - React, Tailwind, and code Playground

HTML

<p>可以用游標反白一段文字看看::selection的效果，Lorem ipsum dolor sit amet, consectetur adipisicing elit. Expedita nam, aliquam repudiandae ratione. Esse iure ipsam provident maiores minima eveniet reprehenderit tenetur corporis quibusdam eum. Architecto sed cumque voluptatum expedita.</p>

CSS

p::first-letter{
  font-size:40px;
  font-weight:bold;
}
p::first-line{
  color:#1F8A70;
}

p::before{
  content: "這是before"
}

p::after{
  content: "這是after"
}

::selection{
  background-color:#FD7400;
}