| <!doctype HTML> |
| |
| <!-- |
| Runs an acquireDisplayLock, which appends the first child and schedules two |
| continuations. The continuations append second and third children as well |
| as scheduling two more continuations each, for a total of 7 children. |
| --> |
| |
| <style> |
| #container { |
| contain: content; |
| width: 150px; |
| height: 150px; |
| background: lightblue; |
| } |
| .child { |
| width: 20px; |
| height: 20px; |
| background: lightgreen; |
| } |
| </style> |
| |
| <div id="log"></div> |
| |
| <script> |
| if (window.testRunner) |
| window.testRunner.waitUntilDone(); |
| |
| function createChild(id) { |
| let child = document.createElement("div"); |
| child.classList = "child"; |
| child.innerHTML = "" + id; |
| return child; |
| } |
| |
| function addChild(id, context) { |
| context.lockedElement.appendChild(createChild(id)); |
| if (id > 3) |
| return; |
| context.schedule((context) => { addChild(id * 2, context); }); |
| context.schedule((context) => { addChild(id * 2 + 1, context); }); |
| } |
| |
| function finishTest(status_string) { |
| if (document.getElementById("log").innerHTML === "") |
| document.getElementById("log").innerHTML = status_string; |
| if (window.testRunner) |
| window.testRunner.notifyDone(); |
| } |
| |
| function acquire() { |
| let container = document.createElement("div"); |
| container.id = "container"; |
| container.acquireDisplayLock( |
| (context) => { addChild(1, context) }).then( |
| () => { finishTest("PASS"); }, |
| () => { finishTest("FAIL"); }); |
| document.body.appendChild(container); |
| } |
| |
| window.onload = acquire; |
| </script> |
| |
