JSFiddle - React, Tailwind, and code Playground
HTML
<span class="item-level-deux">Premier item</span>
<table>
<tr>
<td>sous menu</td>
<td>sous menu</td>
<td>sous menu</td>
</tr>
</table>
CSS
table {
display:none;
}
span:hover + table {
display:block;
}