JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>one</li>
    <li><strike>one</strike></li>
    <li>one</li>
</ul>

CSS

ul li:before {
          /* margin: 0 0 0 -1em; */
          /* width: 1em; */
          content: '';
          text-decoration: line-through;
        color: red;
}