wpt/css/css-layout-api/fragment-data-immutable.https.html at master · web-platform-tests/wpt · GitHub

Name: wpt/css/css-layout-api/fragment-data-immutable.https.html at master · web-platform-tests/wpt · GitHub
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<!DOCTYPE html>
<htmlclass=reftest-wait>
<linkrel="help" href="https://drafts.css-houdini.org/css-layout-api/#dom-layoutfragment-data">
<linkrel="match" href="green-square-ref.html">
<metaname="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>
<scriptsrc="/common/reftest-wait.js"></script>
<scriptsrc="/common/worklet-reftest.js"></script>

<divclass="test">
<divclass="child"></div>
</div>

<scriptid="code" type="text/worklet">
registerLayout('parent',class{
asyncintrinsicSizes(){}
asynclayout([child],edges,constraints,styleMap){

constchildFragment10=awaitchild.layoutNextFragment({fixedInlineSize: 10});

// First layout data should be "10".
if(childFragment10.data.size!==10){
return{autoBlockSize: 0,childFragments: [childFragment10]};
}

constchildFragment20=awaitchild.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{
asyncintrinsicSizes(){}
asynclayout(children,edges,constraints,styleMap){
return{autoBlockSize: 10,data: {size: constraints.fixedInlineSize}};
}
});
</script>

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