JSFiddle - React, Tailwind, and code Playground

HTML

<button type="button" class="btn btn-default dropdown-toggle" id="TPN" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
    <span class="text">This</span>
    <span class="caret"></span>
  </button>

JavaScript

$('button').on('click', function() {
    $(this).find('span.text').text("That");
});