JSFiddle - React, Tailwind, and code Playground

HTML

<table border="1">
    <tr>
        <td class="flip">Detaljnije 1</td>
    </tr>
    <tr class="panel" style="display:none" id="Nem">
        <td>Ovde su detalji 1</td>
    </tr>
    <tr>
        <td class="flip">Detaljnije 2</td>
    </tr>
    <tr class="panel" style="display:none">
        <td>Ovde su detalji 2</td>
    </tr>
    <tr>
        <td class="flip">Detaljnije 3</td>
    </tr>
    <tr class="panel" style="display:none">
        <td>Ovde su detalji 3</td>
    </tr>
</table>

JavaScript

$(document).ready(function () {
    $(".flip").click(function () {
        $(this).parent('tr').next().slideToggle();
    });
});