| <!doctype html> |
| <meta charset=utf-8> |
| <title>CSSAnimation.currentTime</title> |
| <!-- TODO: Add a more specific link for this once it is specified. --> |
| <link rel="help" href="https://drafts.csswg.org/css-animations-2/#cssanimation"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="support/testcommon.js"></script> |
| <style> |
| |
| .animated-div { |
| margin-left: 10px; |
| /* Make it easier to calculate expected values: */ |
| animation-timing-function: linear ! important; |
| } |
| |
| @keyframes anim { |
| from { margin-left: 100px; } |
| to { margin-left: 200px; } |
| } |
| |
| </style> |
| <div id="log"></div> |
| <script type="text/javascript"> |
| |
| 'use strict'; |
| |
| promise_test(async t => { |
| const div = addDiv(t, { class: 'animated-div' }); |
| div.style.animation = 'anim 100s'; |
| const animation = div.getAnimations()[0]; |
| |
| assert_equals( |
| animation.currentTime, |
| 0, |
| 'Animation.currentTime should be zero when an animation ' + |
| 'is initially created' |
| ); |
| |
| await animation.ready; |
| |
| animation.currentTime = 50 * MS_PER_SEC; |
| |
| assert_time_equals_literal( |
| animation.currentTime, |
| 50 * MS_PER_SEC, |
| 'Check setting of currentTime actually works' |
| ); |
| assert_equals(getComputedStyle(div).marginLeft, '150px'); |
| }, 'currentTime can be used to seek a CSS animation'); |
| |
| promise_test(async t => { |
| const div = addDiv(t, { class: 'animated-div' }); |
| div.style.animation = 'anim 100s'; |
| |
| const animation = div.getAnimations()[0]; |
| await animation.ready; |
| |
| assert_throws( |
| new TypeError(), |
| () => { |
| animation.currentTime = null; |
| }, |
| 'Expect TypeError exception on trying to set Animation.currentTime to null' |
| ); |
| }, 'Setting currentTime to null on a CSS animation throws'); |
| |
| </script> |
