JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul>
  <li>Abacaxi</li>
  <li>Banana</li>
  <li>Caqui</li>
  <li>Damasco</li>
</ul>

CSS

.selected {
  font-weight: bold;
  text-decoration: line-through;
}

JavaScript

$(() => {

	$("li").on("click", function (event) {
  	$(this).toggleClass("selected");
  });

});