firefox/testing/web-platform/tests/css/css-scrollbars/scrollbar-width-002.html

<!doctype html>
<meta charset="utf-8">
<title>CSS Scrollbars: scrollbar-width with vertical text and horizontal scrollbar</title>
<link rel="author" title="Felipe Erias Morandeira" href="mailto:[email protected]" />
<link rel="help" href="https://www.w3.org/TR/css-scrollbars-1/" />
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/support/parsing-testcommon.js"></script>
<style>
  /* Use scrollbar-gutter to reserve space for the scrollbar. */
  .container {
    scrollbar-gutter: stable;
    overflow: auto;
    height: 200px;
    width: 200px;
    margin: 1px;
    padding: 0px;
    border: none;
    background: deepskyblue;
  }

  .content {
    height: 100%;
    width: 300px;
    background: lightsalmon;
  }

  /* writing directions */
  .vertical-lr {
    writing-mode: vertical-lr;
  }

  .vertical-rl {
    writing-mode: vertical-rl;
  }

  .container.auto {
    scrollbar-width: auto;
  }

  .container.thin {
    scrollbar-width: thin;
  }

  .container.none {
    scrollbar-width: none;
  }
</style>
<script type="text/javascript">

  function performTest() {
    setup({ explicit_done: true });

    // vertical-lr

    test(function () {
      let container = document.getElementById('container_vlr_auto');
      let content = document.getElementById('content_vlr_auto');
      assert_less_than(container.scrollHeight, container.offsetHeight, "vertical-lr auto scrollHeight");
      assert_less_than(container.clientHeight, container.offsetHeight, "vertical-lr auto clientHeight");
      assert_equals(container.clientHeight, content.clientHeight, "vertical-lr auto clientHeight");
      assert_not_equals(container.offsetHeight, content.offsetHeight, "vertical-lr auto offsetHeight");
    }, "vertical-lr, scrollbar-width auto");

    test(function () {
      let container = document.getElementById('container_vlr_thin');
      let content = document.getElementById('content_vlr_thin');
      assert_less_than(container.scrollHeight, container.offsetHeight, "vertical-lr thin scrollHeight");
      assert_less_than(container.clientHeight, container.offsetHeight, "vertical-lr thin clientHeight");
      assert_equals(container.clientHeight, content.clientHeight, "vertical-lr thin clientHeight");
      assert_not_equals(container.offsetHeight, content.offsetHeight, "vertical-lr thin offsetHeight");
    }, "vertical-lr, scrollbar-width thin");

    test(function () {
      let auto_scrollbar_height =
        document.getElementById('container_vlr_auto').offsetHeight -
        document.getElementById('container_vlr_auto').clientHeight;
      let thin_scrollbar_height =
        document.getElementById('container_vlr_thin').offsetHeight -
        document.getElementById('container_vlr_thin').clientHeight;
      assert_less_than_equal(thin_scrollbar_height, auto_scrollbar_height, "vertical-lr, thin <= auto");
    }, 'vertical-lr, scrollbar-width "thin" is same or thinner than "auto"');

    test(function () {
      let container = document.getElementById('container_vlr_none');
      let content = document.getElementById('content_vlr_none');
      assert_equals(container.scrollHeight, 200, "vertical-lr none scrollHeight");
      assert_equals(container.clientHeight, 200, "vertical-lr none clientHeight");
      assert_equals(container.clientHeight, content.clientHeight, "vertical-lr none clientHeight");
      assert_equals(container.offsetHeight, content.offsetHeight, "vertical-lr none offsetHeight");
    }, "vertical-lr, scrollbar-width none");

    // vertical-rl

    test(function () {
      let container = document.getElementById('container_vrl_auto');
      let content = document.getElementById('content_vrl_auto');
      assert_less_than(container.scrollHeight, container.offsetHeight, "vertical-rl auto scrollHeight");
      assert_less_than(container.clientHeight, container.offsetHeight, "vertical-rl auto clientHeight");
      assert_equals(container.clientHeight, content.clientHeight, "vertical-rl auto clientHeight");
      assert_not_equals(container.offsetHeight, content.offsetHeight, "vertical-rl auto offsetHeight");
    }, "vertical-rl, scrollbar-width auto");

    test(function () {
      let container = document.getElementById('container_vrl_thin');
      let content = document.getElementById('content_vrl_thin');
      assert_less_than(container.scrollHeight, container.offsetHeight, "vertical-rl thin scrollHeight");
      assert_less_than(container.clientHeight, container.offsetHeight, "vertical-rl thin clientHeight");
      assert_equals(container.clientHeight, content.clientHeight, "vertical-rl thin clientHeight");
      assert_not_equals(container.offsetHeight, content.offsetHeight, "vertical-rl thin offsetHeight");
    }, "vertical-rl, scrollbar-width thin");

    test(function () {
      let auto_scrollbar_height =
        document.getElementById('container_vrl_auto').offsetHeight -
        document.getElementById('container_vrl_auto').clientHeight;
      let thin_scrollbar_height =
        document.getElementById('container_vrl_thin').offsetHeight -
        document.getElementById('container_vrl_thin').clientHeight;
      assert_less_than_equal(thin_scrollbar_height, auto_scrollbar_height, "vertical-rl, thin <= auto");
    }, 'vertical-rl, scrollbar-width "thin" is same or thinner than "auto"');

    test(function () {
      let container = document.getElementById('container_vrl_none');
      let content = document.getElementById('content_vrl_none');
      assert_equals(container.scrollHeight, 200, "vertical-rl none scrollHeight");
      assert_equals(container.clientHeight, 200, "vertical-rl none clientHeight");
      assert_equals(container.clientHeight, content.clientHeight, "vertical-rl none clientHeight");
      assert_equals(container.offsetHeight, content.offsetHeight, "vertical-rl none offsetHeight");
    }, "vertical-rl, scrollbar-width none");

    done();
  }

</script>

<body onload="performTest()">

  Test scrollbar-width: horizontal scrollbar, vertical-lr direction

  <div class="container vertical-lr auto" id="container_vlr_auto">
    <div class="content" id="content_vlr_auto">auto</div>
  </div>

  <div class="container vertical-lr thin" id="container_vlr_thin">
    <div class="content" id="content_vlr_thin">thin</div>
  </div>

  <div class="container vertical-lr none" id="container_vlr_none">
    <div class="content" id="content_vlr_none">none</div>
  </div>

  Test scrollbar-width: horizontal scrollbar, vertical-rl direction

  <div class="container vertical-rl auto" id="container_vrl_auto">
    <div class="content" id="content_vrl_auto">auto</div>
  </div>

  <div class="container vertical-rl thin" id="container_vrl_thin">
    <div class="content" id="content_vrl_thin">thin</div>
  </div>

  <div class="container vertical-rl none" id="container_vrl_none">
    <div class="content" id="content_vrl_none">none</div>
  </div>

</body>