| <!doctype HTML> |
| |
| <style> |
| .container { |
| contain: style layout; |
| } |
| #outer { |
| width: 100px; |
| height: 100px; |
| background: lightblue; |
| } |
| #inner { |
| width: 50px; |
| height: 50px; |
| background: lightgreen; |
| } |
| div > div > div { |
| width: 10px; |
| height: 10px; |
| background: red; |
| } |
| </style> |
| |
| <div id="log"></div> |
| <div id="outer" class="container"> |
| <div id="inner" class="container"></div> |
| </div> |
| |
| <script> |
| // TODO(vmpstr): In WPT this needs to be replaced with reftest-wait. |
| if (window.testRunner) |
| window.testRunner.waitUntilDone(); |
| |
| function finishTest(status_string) { |
| if (document.getElementById("log").innerHTML === "") |
| document.getElementById("log").innerHTML = status_string; |
| if (window.testRunner) |
| window.testRunner.notifyDone(); |
| } |
| |
| async function runTest() { |
| let outer = document.getElementById("outer"); |
| let inner = document.getElementById("inner"); |
| |
| await Promise.all([ |
| outer.displayLock.acquire({ timeout: Infinity }), |
| inner.displayLock.acquire({ timeout: Infinity })]); |
| // Dirty the inner layout |
| inner.appendChild(document.createElement("div")); |
| inner.displayLock.commit().then( |
| () => { finishTest("PASS"); }, |
| (e) => { finishTest("FAIL " + e.message); }); |
| } |
| |
| window.onload = runTest; |
| </script> |
