JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://code.jquery.com/jquery-3.1.1.min.js"></script>
<table>
<html>
<tr id="tr1">
  <td>
    <button>
      Hello
    </button>
  </td>
</tr>
<tr id="tr2">
  <td>
    <button>
      Hello2
    </button>
  </td>
</tr>
</table>

JavaScript

$("button").click(function(event) {
	alert($(this).closest("tr").attr("id"));
});