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<!DOCTYPE html>
<title>Tests that anchor positioned scrolling works in vertical-rl writing mode</title>
<link rel="author" href="mailto:xiaochengh@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-anchor-1/#scrolling">
<link rel="match" href="reference/anchor-scroll-vrl-ref.html">
<link rel="stylesheet" href="/fonts/ahem.css">
<style>
:root {
/* Prevents creatings scrollbar on the viewport due to anchored element's
* layout position being out of the viewport.
* TODO(crbug.com/1309178): Revisit this behavior.
*/
overflow: clip;
}
body {
font: 20px/1 Ahem;
margin: 0;
writing-mode: vertical-rl;
white-space: nowrap;
}
#scroll-container {
width: 400px;
height: 400px;
overflow: scroll;
}
#scroll-contents {
width: 1000px;
height: 1000px;
position: relative;
}
#placefiller-above-anchor {
width: 500px;
}
#placefiller-before-anchor {
display: inline-block;
height: 500px;
}
#anchor {
anchor-name: --anchor;
}
#inner-anchored {
color: green;
position: absolute;
top: anchor(--anchor top);
left: anchor(--anchor right);
position-anchor: --anchor;
}
#outer-anchored {
color: yellow;
position: absolute;
top: anchor(--anchor top);
right: anchor(--anchor left);
position-anchor: --anchor;
}
</style>
<div style="position: relative;">
<div id="scroll-container">
<div id="scroll-contents">
<div id="placefiller-above-anchor"></div>
<div id="placefiller-before-anchor"></div>
<span id="anchor">anchor</span>
<div id="inner-anchored">inner-anchored</div>
</div>
</div>
<div id="outer-anchored">outer-anchored</div>
</div>
<script>
const scroller = document.getElementById('scroll-container');
scroller.scrollTop = 450;
scroller.scrollLeft = -300;
</script>
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