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1 <!DOCTYPE html> | |
2 <meta charset=utf-8> | |
3 <title>Model liveness: currentTime will not change in a task (frames)</title> | |
4 <link rel="help" href="https://w3c.github.io/web-animations/#model-liveness"> | |
5 <script src="../resources/testharness.js"></script> | |
6 <script src="../resources/testharnessreport.js"></script> | |
7 <script src="../external/wpt/web-animations/testcommon.js"></script> | |
8 | |
9 <iframe id=frame></iframe> | |
10 | |
11 <script> | |
12 var handle = async_test('Document timeline should tick consistently across frame
s'); | |
13 var baseTime = document.timeline.currentTime; | |
14 var frameBaseTime = frame.contentDocument.timeline.currentTime; | |
15 setTimeout(() => { | |
16 // Ensure that time in this task has advanced sufficiently for implementations | |
17 // that might bind the currentTime lazily. | |
18 var start = performance.now(); | |
19 while (performance.now() - start < 30); | |
20 var delta = document.timeline.currentTime - baseTime; | |
21 | |
22 // Advance time further before querying the frame's time. | |
23 var start = performance.now(); | |
24 while (performance.now() - start < 30); | |
25 var frameDelta = frame.contentDocument.timeline.currentTime - frameBaseTime; | |
26 | |
27 handle.step(() => assert_times_equal(delta, frameDelta)); | |
28 handle.done(); | |
29 }); | |
30 </script> | |
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