JSFiddle - React, Tailwind, and code Playground

HTML

<table>
<tr class=vertical><td>header1</td><td>header2</td></tr>
<tr><td>content1</td><td>content2</td></tr>
</table>

CSS

.vertical * {
  writing-mode: vertical-lr;
  transform: rotate(180deg);
}

table {
  border: 1px solid black;
}

table td {
  border: 1px dotted black;
}