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1 <!DOCTYPE html> | |
2 <script src="../resources/testharness.js"></script> | |
3 <script src="../resources/testharnessreport.js"></script> | |
4 | |
5 <iframe id=frame></iframe> | |
6 | |
7 <script> | |
8 var handle = async_test('Animation time should tick consistently across frames')
; | |
9 var baseTime = document.timeline.currentTime; | |
10 var frameBaseTime = frame.contentDocument.timeline.currentTime; | |
11 setTimeout(function() { | |
12 var start = performance.now(); | |
13 while (performance.now() - start < 30); | |
14 var delta = document.timeline.currentTime - baseTime; | |
15 | |
16 var start = performance.now(); | |
17 while (performance.now() - start < 30); | |
18 var frameDelta = frame.contentDocument.timeline.currentTime - frameBaseTime; | |
19 | |
20 handle.step(() => assert_equals(Math.round(delta), Math.round(frameDelta))); | |
21 handle.done(); | |
22 }); | |
23 </script> | |
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