firefox/testing/web-platform/tests/css/css-scrollbars/scrollbar-width-001.html

<!doctype html>
<meta charset="utf-8">
<title>CSS Scrollbars: scrollbar-width with horizontal text and vertical 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;
    writing-mode: horizontal-tb;
    overflow: auto;
    height: 200px;
    width: 200px;
    margin: 1px;
    padding: 0px;
    border: none;
    background: deepskyblue;
  }

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

  /* writing directions */
  .ltr {
    direction: ltr;
  }

  .rtl {
    direction: rtl;
  }

  .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 });

    // ltr

    test(function () {
      let container = document.getElementById('container_ltr_auto');
      let content = document.getElementById('content_ltr_auto');
      assert_less_than(container.scrollWidth, container.offsetWidth, "ltr auto scrollWidth");
      assert_less_than(container.clientWidth, container.offsetWidth, "ltr auto clientWidth");
      assert_equals(container.offsetLeft, content.offsetLeft, "ltr auto offsetLeft");
      assert_equals(container.clientWidth, content.clientWidth, "ltr auto clientWidth");
      assert_not_equals(container.offsetWidth, content.offsetWidth, "ltr auto offsetWidth");
    }, "horizontal-tb, ltr, scrollbar-width auto");

    test(function () {
      let container = document.getElementById('container_ltr_thin');
      let content = document.getElementById('content_ltr_thin');
      assert_less_than(container.scrollWidth, container.offsetWidth, "ltr thin scrollWidth");
      assert_less_than(container.clientWidth, container.offsetWidth, "ltr thin clientWidth");
      assert_equals(container.offsetLeft, content.offsetLeft, "ltr thin offsetLeft");
      assert_equals(container.clientWidth, content.clientWidth, "ltr thin clientWidth");
      assert_not_equals(container.offsetWidth, content.offsetWidth, "ltr thin offsetWidth");
    }, "horizontal-tb, ltr, scrollbar-width thin");

    test(function () {
      let auto_scrollbar_width =
      document.getElementById('container_ltr_auto').offsetWidth -
      document.getElementById('container_ltr_auto').clientWidth;
      let thin_scrollbar_width =
      document.getElementById('container_ltr_thin').offsetWidth -
      document.getElementById('container_ltr_thin').clientWidth;
      assert_less_than_equal(thin_scrollbar_width, auto_scrollbar_width, "ltr, thin <= auto");
    }, 'horizontal-tb, ltr, scrollbar-width "thin" is same or thinner than "auto"');

    test(function () {
      let container = document.getElementById('container_ltr_none');
      let content = document.getElementById('content_ltr_none');
      assert_equals(container.scrollWidth, 200, "ltr none scrollWidth");
      assert_equals(container.clientWidth, 200, "ltr none clientWidth");
      assert_equals(container.offsetLeft, content.offsetLeft, "ltr none offsetLeft");
      assert_equals(container.clientWidth, content.clientWidth, "ltr none clientWidth");
      assert_equals(container.offsetWidth, content.offsetWidth, "ltr none offsetWidth");
    }, "horizontal-tb, ltr, scrollbar-width none");

    // rtl

    test(function () {
      let container = document.getElementById('container_rtl_auto');
      let content = document.getElementById('content_rtl_auto');
      assert_less_than(container.scrollWidth, container.offsetWidth, "rtl auto scrollWidth");
      assert_less_than(container.clientWidth, container.offsetWidth, "rtl auto clientWidth");
      assert_less_than(container.offsetLeft, content.offsetLeft, "rtl auto offsetLeft");
      assert_equals(container.clientWidth, content.clientWidth, "rtl auto clientWidth");
      assert_not_equals(container.offsetWidth, content.offsetWidth, "rtl auto offsetWidth");
    }, "horizontal-tb, rtl, scrollbar-width auto");

    test(function () {
      let container = document.getElementById('container_rtl_thin');
      let content = document.getElementById('content_rtl_thin');
      assert_less_than(container.scrollWidth, container.offsetWidth, "rtl thin scrollWidth");
      assert_less_than(container.clientWidth, container.offsetWidth, "rtl thin clientWidth");
      assert_less_than(container.offsetLeft, content.offsetLeft, "rtl thin offsetLeft");
      assert_equals(container.clientWidth, content.clientWidth, "rtl thin clientWidth");
      assert_not_equals(container.offsetWidth, content.offsetWidth, "rtl thin offsetWidth");
    }, "horizontal-tb, rtl, scrollbar-width thin");

    test(function () {
      let auto_scrollbar_width =
      document.getElementById('container_rtl_auto').offsetWidth -
      document.getElementById('container_rtl_auto').clientWidth;
      let thin_scrollbar_width =
      document.getElementById('container_rtl_thin').offsetWidth -
      document.getElementById('container_rtl_thin').clientWidth;
      assert_less_than_equal(thin_scrollbar_width, auto_scrollbar_width, "rtl, thin < auto");
    }, 'horizontal-tb, rtl, scrollbar-width "thin" is same or thinner than "auto"');

    test(function () {
      let container = document.getElementById('container_rtl_none');
      let content = document.getElementById('content_rtl_none');
      assert_equals(container.scrollWidth, 200, "rtl none scrollWidth");
      assert_equals(container.clientWidth, 200, "rtl none clientWidth");
      assert_equals(container.offsetLeft, content.offsetLeft, "rtl none offsetLeft");
      assert_equals(container.clientWidth, content.clientWidth, "rtl none clientWidth");
      assert_equals(container.offsetWidth, content.offsetWidth, "rtl none offsetWidth");
    }, "horizontal-tb, rtl, scrollbar-width none");

    done();
  }

</script>

<body onload="performTest()">

  Test scrollbar-width: vertical scrollbar, ltr direction

  <div class="container ltr auto" id="container_ltr_auto">
    <div class="content" id="content_ltr_auto">auto</div>
  </div>

  <div class="container ltr thin" id="container_ltr_thin">
    <div class="content" id="content_ltr_thin">thin</div>
  </div>

  <div class="container ltr none" id="container_ltr_none">
    <div class="content" id="content_ltr_none">none</div>
  </div>

  Test scrollbar-width: vertical scrollbar, rtl direction

  <div class="container rtl auto" id="container_rtl_auto">
    <div class="content" id="content_rtl_auto">auto</div>
  </div>

  <div class="container rtl thin" id="container_rtl_thin">
    <div class="content" id="content_rtl_thin">thin</div>
  </div>

  <div class="container rtl none" id="container_rtl_none">
    <div class="content" id="content_rtl_none">none</div>
  </div>

</body>