JSFiddle - React, Tailwind, and code Playground
by Naresh
HTML
<ul>
<li>One
<ul>
<li id="inner">SubOne</li>
<li>SubTwo</li>
<li>SubThree</li>
</ul>
</li>
<li>two</li>
<li>three</li>
</ul>
CSS
.active{
font-weight: bold;
}
JavaScript
$('li').on('click', function(){
$(this).addClass('active');
});