css/css-layout-api/auto-block-size-negative.https.html

<!DOCTYPE html>
<html class=reftest-wait>
<link rel="help" href="https://drafts.css-houdini.org/css-layout-api/#interaction-sizing">
<link rel="match" href="auto-block-size-negative-ref.html">
<meta name="assert" content="This test checks that auto-block-size is correctly clamped to zero." />
<meta name="assert" content="TODO" />

<style>

.test {
  background: red;
  border: solid 2px;
  margin: 20px 0;
}

.width-100 {
  width: 100px;
  writing-mode: horizontal-tb;
}

.height-100 {
  height: 100px;
  writing-mode: vertical-rl;
}

@supports (display: layout(block-size-negative)) {
  .test {
    display: layout(block-size-negative);
    background: green;
  }
}
</style>
<script src="/common/reftest-wait.js"></script>
<script src="/common/worklet-reftest.js"></script>

<div class="test width-100"></div>
<div class="test height-100"></div>

<script id="code" type="text/worklet">
registerLayout('block-size-negative', class {
  *intrinsicSizes() {}
  *layout() {
    return {autoBlockSize: -100};
  }
});
</script>

<script>
importWorkletAndTerminateTestAfterAsyncPaint(CSS.layoutWorklet, document.getElementById('code').textContent);
</script>
</html>