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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/computed-testcommon.js"></script>
<style>
#outer { scroll-timeline-attachment: defer; }
#target { scroll-timeline-attachment: ancestor; }
</style>
<div id="outer">
<div id="target"></div>
</div>
<script>
test_computed_value('scroll-timeline-attachment', 'initial', 'local');
test_computed_value('scroll-timeline-attachment', 'inherit', 'defer');
test_computed_value('scroll-timeline-attachment', 'unset', 'local');
test_computed_value('scroll-timeline-attachment', 'revert', 'local');
test_computed_value('scroll-timeline-attachment', 'local');
test_computed_value('scroll-timeline-attachment', 'defer');
test_computed_value('scroll-timeline-attachment', 'ancestor');
test_computed_value('scroll-timeline-attachment', 'local, defer');
test_computed_value('scroll-timeline-attachment', 'defer, ancestor');
test_computed_value('scroll-timeline-attachment', 'local, defer, ancestor');
test_computed_value('scroll-timeline-attachment', 'local, local, local, local');
test(() => {
let style = getComputedStyle(document.getElementById('target'));
assert_not_equals(Array.from(style).indexOf('scroll-timeline-attachment'), -1);
}, 'The scroll-timeline-attachment property shows up in CSSStyleDeclaration enumeration');
test(() => {
let style = document.getElementById('target').style;
assert_not_equals(style.cssText.indexOf('scroll-timeline-attachment'), -1);
}, 'The scroll-timeline-attachment property shows up in CSSStyleDeclaration.cssText');
</script>
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