JSFiddle - React, Tailwind, and code Playground
by Tim Büthe
HTML
<table border="1">
<tr>
<th class="verticalTableHeader">First</th>
<th class="verticalTableHeader">Second</th>
<th class="verticalTableHeader">Third</th>
</tr>
<tr>
<td>foo</td>
<td>foo</td>
<td>foo</td>
</tr>
<tr>
<td>foo</td>
<td>foo</td>
<td>foo</td>
</tr>
<tr>
<td>foo</td>
<td>foo</td>
<td>foo</td>
</tr>
</table>
CSS
.verticalTableHeader {
-webkit-transform: rotate(90deg);
-moz-transform: rotate(90deg);
-ms-transform: rotate(90deg);
-o-transform: rotate(90deg);
transform: rotate(90deg);
}