JSFiddle - React, Tailwind, and code Playground

HTML

<table>
  <tbody>
    <tr class="first-level">
      <td>First Level</td>
      <td>First Level</td>
      <td>First Level</td>
      <td>First Level</td>
      <td>First Level</td>
    </tr>
    <tr class="second-level">
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
    </tr>
    <tr class="second-level">
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
    </tr>
    <tr class="second-level">
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
    </tr>
    <tr class="first-level">
      <td>First Level</td>
      <td>First Level</td>
      <td>First Level</td>
      <td>First Level</td>
      <td>First Level</td>
    </tr>
    <tr class="second-level">
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
    </tr>
    <tr class="second-level">
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
    </tr>
    <tr class="second-level">
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
      <td>Second Level</td>
    </tr>
  </tbody>
</table>

CSS

.second-level {
    display: none;
}

JavaScript

var firstLevel = $('.first-level')
var secondLevel = $('.second-level')

$(firstLevel).click(function() {
    $(secondLevel).nextUntil(firstLevel).toggle("slow");
});