css/css-overflow/logical-overflow-001.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Overflow Test: flow-relative versions of overflow-x and -y</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net">
<link rel="help" href="https://drafts.csswg.org/css-overflow-3/#logical">
<link rel="help" href="https://drafts.csswg.org/css-logical/#box">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
#d1, #d2 {
  overflow-block: hidden;
  overflow-inline: scroll
}
#d1 {
  writing-mode: horizontal-tb;
}
#d2 {
  writing-mode: vertical-rl;
}

</style>
<body>
  <div id="log"></div>

  <div id=d1></div>
  <div id=d2></div>

  <script>
    test(
      function(){
        var target = document.getElementById("d1");
        assert_equals(getComputedStyle(target).overflowX, "scroll");
        assert_equals(getComputedStyle(target).overflowY, "hidden");
      }, "overflow-x matches overflow-inline, and overflow-y matches overflow-block when the element has a horizontal writing mode");
    test(
      function(){
        var target = document.getElementById("d2");
        assert_equals(getComputedStyle(target).overflowX, "hidden");
        assert_equals(getComputedStyle(target).overflowY, "scroll");
      }, "overflow-y matches overflow-inline, and overflow-x matches overflow-block when the element has a vertical writing mode");
  </script>
</body>