| <!DOCTYPE html> |
| <meta charset=utf-8> |
| <title>Animation.play</title> |
| <link rel="help" href="https://drafts.csswg.org/web-animations/#dom-animation-play"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="../../testcommon.js"></script> |
| <body> |
| <div id="log"></div> |
| <script> |
| 'use strict'; |
| |
| promise_test(t => { |
| const div = createDiv(t); |
| const animation = div.animate({ transform: ['none', 'translate(10px)']}, |
| { duration: 100 * MS_PER_SEC, |
| iterations: Infinity }); |
| return animation.ready.then(() => { |
| // Seek to a time outside the active range so that play() will have to |
| // snap back to the start |
| animation.currentTime = -5 * MS_PER_SEC; |
| animation.playbackRate = -1; |
| |
| assert_throws('InvalidStateError', |
| () => { animation.play(); }, |
| 'Expected InvalidStateError exception on calling play() ' + |
| 'with a negative playbackRate and infinite-duration ' + |
| 'animation'); |
| }); |
| }, 'play() throws when seeking an infinite-duration animation played in ' + |
| 'reverse'); |
| |
| </script> |
| </body> |
