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<!DOCTYPE html>
<meta charset="utf-8">
<title>ScrollTimeline constructor - no document</title>
<link rel="help" href="https://wicg.github.io/scroll-animations/#scrolltimeline-interface">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
'use strict';
test(function() {
document.documentElement.remove();
assert_equals(document.scrollingElement, null);
const timeline = new ScrollTimeline();
assert_equals(timeline.source, null);
assert_equals(timeline.currentTime, null);
}, 'The source can be null if the document.scrollingElement does not exist');
</script>
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