JSFiddle - React, Tailwind, and code Playground

HTML

<a href="#" id="right-button"><img class="arrow" src="http://placekitten.com/200/200" alt="right" /></a>

JavaScript

$('.arrow').hover(
   function() {
         $(this).find('img').fadeTo('slow', 0.5);
  },
   function() {
         $(this).find('img').fadeTo('slow', 1);
  }
);