JSFiddle - React, Tailwind, and code Playground

HTML

<ul class="notification-body" style="">
    <li class="testClass" data-associateid="AA01">1</li>
    <li class="testClass" data-associateid="AA02">2</li>
    <li class="testClass" data-associateid="AA03">3</li>
</ul>

JavaScript

$(document).ready(function() {
    $('.testClass').on('click', function(){
        alert( $(this).data('associateid') );
    });
});