fragment-data-immutable.https.html (1908B)
1 <!DOCTYPE html> 2 <html class=reftest-wait> 3 <link rel="help" href="https://drafts.css-houdini.org/css-layout-api/#dom-layoutfragment-data"> 4 <link rel="match" href="green-square-ref.html"> 5 <meta name="assert" content="This test checks that LayoutFragment#data is immutable between child layout passes." /> 6 <style> 7 .test { 8 background: red; 9 width: 100px; 10 } 11 12 @supports (display: layout(parent)) { 13 .test { 14 display: layout(parent); 15 background: green; 16 } 17 18 .child { 19 display: layout(child); 20 } 21 } 22 </style> 23 <script src="/common/reftest-wait.js"></script> 24 <script src="/common/worklet-reftest.js"></script> 25 26 <div class="test"> 27 <div class="child"></div> 28 </div> 29 30 <script id="code" type="text/worklet"> 31 registerLayout('parent', class { 32 async intrinsicSizes() {} 33 async layout([child], edges, constraints, styleMap) { 34 35 const childFragment10 = await child.layoutNextFragment({fixedInlineSize: 10}); 36 37 // First layout data should be "10". 38 if (childFragment10.data.size !== 10) { 39 return {autoBlockSize: 0, childFragments: [childFragment10]}; 40 } 41 42 const childFragment20 = await child.layoutNextFragment({fixedInlineSize: 20}); 43 44 // Second layout data should be "20". 45 if (childFragment20.data.size !== 20) { 46 return {autoBlockSize: 0, childFragments: [childFragment10]}; 47 } 48 49 // First layout data should still be "10". 50 if (childFragment10.data.size !== 10) { 51 return {autoBlockSize: 0, childFragments: [childFragment10]}; 52 } 53 54 return {autoBlockSize: 100, childFragments: [childFragment20]}; 55 } 56 }); 57 58 registerLayout('child', class { 59 async intrinsicSizes() {} 60 async layout(children, edges, constraints, styleMap) { 61 return {autoBlockSize: 10, data: {size: constraints.fixedInlineSize}}; 62 } 63 }); 64 </script> 65 66 <script> 67 importWorkletAndTerminateTestAfterAsyncPaint(CSS.layoutWorklet, document.getElementById('code').textContent); 68 </script> 69 </html>