css/css-break/background-attachment-fixed.html

<!DOCTYPE html>
<html class="reftest-wait">
<link rel="help" href="https://www.w3.org/TR/css-break-3/#valdef-box-decoration-break-slice">
<link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#background-image">
<link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#background-attachment">
<link rel="match" href="background-attachment-fixed-ref.html">
<style>
body {
  overflow: hidden;
  margin: 0;
}
</style>
<div style="height: 300px"></div>
<div style="width: 320px; height: 200px; columns: 3; column-gap: 10px">
  <div style="height: 600px;
              border: 20px solid transparent;
              box-sizing: border-box;
              padding: 10px;
              background-size: 200px 200px;
              background-image: linear-gradient(blue 50%, green 50%);
              background-clip: content-box;
              background-attachment: fixed">
  </div>
</div>
<div style="width: 2000px; height: 2000px"></div>
<script>
requestAnimationFrame(() => {
  requestAnimationFrame(() => {
    window.scrollTo(0, 300);
    document.documentElement.classList.remove('reftest-wait');
  });
});
</script>