JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>link1</li>
    <li>link2</li>
    <li>link3</li>
</ul>

CSS

li{
    width:70px;
    height:20px;
    background:blue;
    color:white;
    float:left;
    margin-right:2px;
    text-align:center;
}
.selected{
    background:red;
}

JavaScript

$('li').click(function() {
    $('li').removeClass('selected');
    $(this).addClass('selected');
});