css/css-scroll-snap/scroll-target-margin-005.html

<!doctype html>
<title>scroll-margin on input widget</title>
<link rel="author" href="mailto:emilio@crisal.io" title="Emilio Cobos Álvarez">
<link rel="author" href="https://mozilla.org" title="Mozilla">
<link rel="help" href="https://www.w3.org/TR/css-scroll-snap-1/#scroll-margin">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1729292">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
  #target {
    scroll-margin-top: 200px;
  }
  .padding {
    height: 5000px;
  }
</style>

<div id="container">
  <div class="padding"></div>
  <input type="date" id="target">
  <div class="padding"></div>
</div>

<script>
test(function() {
  document.scrollingElement.scrollTo(0, 20000);
  document.getElementById("target").focus();
  // Should be around 4900 (5000 - 200px of margin). Give some leeway to account for line height / borders / input padding / etc.
  assert_between_exclusive(document.scrollingElement.scrollTop, 4750, 4850, "Should honor date input scroll-margin");
});
</script>