File: scroll-timeline-anonymous-source-scrollable-body-quirks-mode.html

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<html>
<title>The scroll() timeline source in quirks mode with a scrollable &lt;body> 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 }
}

html {
  height: 100px;
  padding: 20px;
}

body {
  height: 110vh;
  overflow: auto;

  animation: 1s move linear, 1s move linear, 1s move linear;
  animation-timeline: scroll(self), scroll(nearest), scroll(root);
}

body::after {
  content: "";
  display: block;
  height: 110%;
}
</style>
<body>
<script>
"use strict";

const timelineSourceTest = data => {
  test(() => {
    assert_equals(document.body.getAnimations()[data.index].timeline.source, document.body);
  }, `CSS animation correctly uses the <body> element as the source for the ${data.keyword} scroll() timeline in quirks mode`);
};

timelineSourceTest({ index: 0, keyword: "self" });
timelineSourceTest({ index: 1, keyword: "nearest" });
timelineSourceTest({ index: 1, keyword: "root" });

</script>
</body>