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<html>
<title>The scroll() timeline source in quirks mode</title>
<link rel="help" href="https://drafts.csswg.org/scroll-animations-1/#scroll-notation">
<link rel="help" href="https://drafts.csswg.org/css-animations-2/#animation-timeline">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
@keyframes move {
to { margin-left: 100px }
}
.animated {
animation: move 1s linear;
}
#default {
animation-timeline: scroll();
}
#root {
animation-timeline: scroll(root);
}
#nearest {
animation-timeline: scroll(nearest);
}
</style>
<div class="animated" id="default"></div>
<div class="animated" id="root"></div>
<div class="animated" id="nearest"></div>
<script>
"use strict";
const timelineSourceTest = type => {
test(() => {
const target = document.getElementById(type);
const animations = target.getAnimations();
assert_equals(animations.length, 1);
assert_equals(animations[0].timeline.source, document.body);
}, `CSS animation correctly uses the <body> element as the source for the ${type} scroll() timeline in quirks mode`);
};
timelineSourceTest("default");
timelineSourceTest("root");
timelineSourceTest("nearest");
</script>
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