JSFiddle - React, Tailwind, and code Playground
HTML
<div id="div1">
<ul>
<li><a href="#" id="id1">link1</a></li>
<li><a href="#" id="id2">link2</a></li>
<li><a href="#" id="id3">link3</a></li>
</ul>
</div>
CSS
.selected {
background-color: #C00;
color: #FFF;
}
JavaScript
$('#div1 a').click(function(e) {
e.preventDefault();
$('#div1 a').removeClass('selected');
$(this).addClass('selected');
});