<!DOCTYPE html>
<link rel="help" href="https://drafts.csswg.org/scroll-animations-1/#scrolltimeline-interface">
<style>
.scroller {
  overflow: auto;
  height: 100px;
  width: 100px;
  will-change: transform;
}

.contents {
  height: 1000px;
  width: 100%;
}
</style>
<div class="scroller">
  <div class="contents"></div>
</div>
<script>
  // Test passes if it does not crash.
  // Scroll timeline animations are progress-based and not compatible with
  // delays specified in milliseconds.
  const scroller = document.querySelector('.scroller');
  const animation = new Animation();
  const timeline = animation.timeline;
  const duration = timeline.duration;
  const options = {
    source: scroller,
    scrollOffsets: [new CSSMathInvert(duration)]
  };
  const scroll_timeline = new ScrollTimeline(options);
</script>
