JSFiddle - React, Tailwind, and code Playground

HTML

<table id="MaTable">
<tbody>
    <tr>
        <td>slip</td>
        <td></td>
        <td></td>
        <td></td>
        <td><a class="pop_admin">xx</a></td>
    </tr>
</tbody>
</table>

JavaScript

$("#MaTable tbody").on("click", ".pop_admin", function(event){
    alert($(this).parents("tr").find("tdfirst-child").text());
});