| <!doctype html> |
| <meta charset=utf-8> |
| <title>The effect value of a keyframe effect: Calculating the interval |
| distance between keyframes</title> |
| <link rel="help" href="https://drafts.csswg.org/web-animations/#the-effect-value-of-a-keyframe-animation-effect"> |
| <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'; |
| |
| test(t => { |
| // In Firefox there was a floating precision bug in the calculation of the |
| // progress at the end of the 0.2<->1.0 interval. This test exercises that |
| // calculation in case other UAs suffer from the same problem. |
| const target = createDiv(t); |
| const anim = target.animate( |
| [ |
| { opacity: 0 }, |
| { offset: 0.2, opacity: 1, easing: 'step-end' }, |
| { opacity: 0 }, |
| ], |
| { |
| duration: 1000, |
| fill: 'forwards', |
| } |
| ); |
| |
| anim.currentTime = 1000; |
| assert_equals(getComputedStyle(target).opacity, '0'); |
| }, 'Interval distance is calculated correctly (precision test)'); |
| |
| </script> |
| </body> |
