| <!DOCTYPE html> |
| <meta charset=utf-8> |
| <title>Test that extending effect should not cause a change in start time</title> |
| <link rel="https://w3c.github.io/web-animations/#the-animation-interface"> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| <script src="../imported/wpt/web-animations/testcommon.js"></script> |
| <script> |
| test(function() { |
| var animation = document.documentElement.animate([], 1000); |
| animation.effect.timing.duration = 1500; |
| assert_times_equal(animation.effect.timing.duration, 1000); |
| }, 'animation.effect should be read-only'); |
| </script> |
