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<html>
<head>
<meta charset="utf-8">
<title>CSS gap width change computed value to non compatible value mid-animation</title>
<link rel="help" href="https://drafts.csswg.org/css-gaps-1/#column-row-rule-width">
<link rel="author" title="Javier Contreras" href="mailto:javiercon@microsoft.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<style>
#target {
column-rule-width: 10px 10px;
column-rule-style: solid;
animation: color-anim 2s linear paused;
}
@keyframes color-anim {
from { column-rule-width: 0px; }
}
</style>
</head>
<body>
<div id="target">Dynamic Gap-Width Test</div>
<script>
promise_test(async () => {
const el = document.getElementById('target');
const anim = el.getAnimations()[0];
assert_equals(getComputedStyle(el).columnRuleWidth, '0px');
// Jump to 50% of the animation.
anim.currentTime = anim.effect.getComputedTiming().duration / 2;
const snapped = getComputedStyle(el).columnRuleWidth;
assert_equals(
snapped,
'10px 10px'
);
el.style.columnRuleWidth = '10px';
const intermediate = getComputedStyle(el).columnRuleWidth;
assert_equals(
intermediate,
'5px'
);
});
</script>
</body>
</html>
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