JSFiddle - React, Tailwind, and code Playground

HTML

<p>
    <a id="foo" href="#bar">FOO</a><br/>
    <a id="bar" href="#foo">BAR</a><br/>
</p>

CSS

a.highlight {
    color:red;
    background-color:blue;
}

JavaScript

$('a').hover(
    function() { $(this).siblings().addClass('highlight') },
    function() { $(this).siblings().removeClass('highlight') }
);