JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://s.hswstatic.com/gif/whiskers-sam.jpg" id="t1" />

<p>Hello World, <a href="#" class="thumbb">Click here</a>. Hover the image to see Click here underlined too.</p>

CSS

.thumbb {text-decoration:none;}
.thumbb:hover, .thumbb-hover {text-decoration:underline;}

JavaScript

$('#t1')
	.on('mouseenter', function() {
		$('.thumbb').addClass('thumbb-hover');
	})
	.on('mouseleave', function() {
		$('.thumbb').removeClass('thumbb-hover');
    });