iterationComposite.html

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This WPT test may be referenced by the following Test IDs:
- /web-animations/interfaces/KeyframeEffect/iterationComposite.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>KeyframeEffect.iterationComposite</title>

<link rel="help" href="https://drafts.csswg.org/web-animations/#dom-keyframeeffect-iterationcomposite">

<script src=/resources/testharness.js></script>

<script src=/resources/testharnessreport.js></script>

<script src="../../testcommon.js"></script>

<div id="log"></div>

<script>

'use strict';

test(t => {

  const div = createDiv(t);

  const anim = div.animate({ marginLeft: ['0px', '10px'] },

                           { duration: 100 * MS_PER_SEC,

                             easing: 'linear',

                             iterations: 10,

                             iterationComposite: 'accumulate' });

  anim.pause();

  anim.currentTime =

    anim.effect.getComputedTiming().duration * 2 +

    anim.effect.getComputedTiming().duration / 2;

  assert_equals(getComputedStyle(div).marginLeft, '25px',

    'Animated style at 50s of the third iteration');

  anim.effect.iterationComposite = 'replace';

  assert_equals(getComputedStyle(div).marginLeft, '5px',

    'Animated style at 50s of the third iteration');

  anim.effect.iterationComposite = 'accumulate';

  assert_equals(getComputedStyle(div).marginLeft, '25px',

    'Animated style at 50s of the third iteration');

}, 'iterationComposite can be updated while an animation is in progress');

</script>