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<!DOCTYPE html>
<html class=reftest-wait>
<link rel="help" href="https://drafts.css-houdini.org/css-layout-api/#dom-layoutfragment-data">
<link rel="match" href="green-square-ref.html">
<meta name="assert" content="This test checks that LayoutFragment#data is immutable between child layout passes." />
<style>
.test {
background: red;
width: 100px;
}
@supports (display: layout(parent)) {
.test {
display: layout(parent);
background: green;
}
.child {
display: layout(child);
}
}
</style>
<script src="/common/reftest-wait.js"></script>
<script src="/common/worklet-reftest.js"></script>
<div class="test">
<div class="child"></div>
</div>
<script id="code" type="text/worklet">
registerLayout('parent', class {
async intrinsicSizes() {}
async layout([child], edges, constraints, styleMap) {
const childFragment10 = await child.layoutNextFragment({fixedInlineSize: 10});
// First layout data should be "10".
if (childFragment10.data.size !== 10) {
return {autoBlockSize: 0, childFragments: [childFragment10]};
}
const childFragment20 = await child.layoutNextFragment({fixedInlineSize: 20});
// Second layout data should be "20".
if (childFragment20.data.size !== 20) {
return {autoBlockSize: 0, childFragments: [childFragment10]};
}
// First layout data should still be "10".
if (childFragment10.data.size !== 10) {
return {autoBlockSize: 0, childFragments: [childFragment10]};
}
return {autoBlockSize: 100, childFragments: [childFragment20]};
}
});
registerLayout('child', class {
async intrinsicSizes() {}
async layout(children, edges, constraints, styleMap) {
return {autoBlockSize: 10, data: {size: constraints.fixedInlineSize}};
}
});
</script>
<script>
importWorkletAndTerminateTestAfterAsyncPaint(CSS.layoutWorklet, document.getElementById('code').textContent);
</script>
</html>
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