css/css-writing-modes/forms/button-appearance-native-vertical.optional.html

<!DOCTYPE html>
<link rel="author" title="Di Zhang" href="mailto:dizhangg@chromium.org">
<link rel="help" href="https://html.spec.whatwg.org/#the-button-element">
<link rel="help" href="https://drafts.csswg.org/css-writing-modes-4/#block-flow">
<title>Button appearance native writing mode vertical</title>
<meta charset="utf-8">
<link rel="mismatch" href="button-appearance-none-vertical.optional.html">
<link rel="mismatch" href="button-appearance-native-horizontal.optional.html">
<link rel="mismatch" href="button-appearance-none-horizontal.optional.html">

<!-- Note test description should be the same across all files to mismatch on. -->
<p>The button element below should match the correct writing mode.</p>
<button style="writing-mode: vertical-rl"></button>