JSFiddle - React, Tailwind, and code Playground

HTML

in this example i want to prevent "alert(0)"
<div class="test">
  <div class="bu">
    <a style="border:1px solid red;">
      click me
    </a>
  </div>
</div>

JavaScript

$(document).on('click', '.bu', function () { alert(1); return false; });
$(document).on('click', '.test', function () { alert(0); return false; }); 
$(document).on('click', '.bu', function () { alert(2); return false; });