css/css-overflow/scrollbar-gutter-002-ref.html

<!DOCTYPE html>
<html>
  <meta charset="utf-8">
  <title>CSS Overflow Reference: test scrollbar-gutter with horizontal left to right content</title>
  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
  <link rel="author" title="Mozilla" href="http://www.mozilla.org/">

  <style>
  .line {
    display: flex;
  }

  .container {
    writing-mode: horizontal-tb;
    direction: ltr;

    box-sizing: border-box;
    block-size: 200px;
    inline-size: 200px;
    margin: 10px;
    background: deepskyblue;
    resize: both;
  }

  .content {
    inline-size: 100%;
    block-size: 200%;
    background: lightsalmon;
  }
  </style>

  <div class="line">
    <div class="container" style="overflow-y: auto">
      <div class="content"></div>
    </div>

    <div class="container" style="overflow-y: scroll" id="container_scroll_stable">
      <div class="content" id="content_scroll_stable"></div>
    </div>

    <div class="container" style="overflow-y: hidden" id="container_hidden_stable">
      <div class="content"></div>
    </div>
  </div>

  <div class="line">
    <div class="container" style="overflow-y: auto;" id="container_auto_stable_both_edges">
      <div class="content"></div>
    </div>

    <div class="container" style="overflow-y: scroll" id="container_scroll_stable_both_edges">
      <div class="content"></div>
    </div>

    <div class="container" style="overflow-y: hidden;" id="container_hidden_stable_both_edges">
      <div class="content"></div>
    </div>
  </div>

  <script>
  let container_scroll_stable = document.getElementById("container_scroll_stable");
  let content_scroll_stable = document.getElementById("content_scroll_stable");
  let vScrollbarWidth = (container_scroll_stable.offsetWidth - content_scroll_stable.offsetWidth);
  let vScrollbarWidthStr = vScrollbarWidth + "px";

  // Simulate scrollbar-gutter via padding on containers.
  document.getElementById("container_hidden_stable").style.paddingInlineEnd = vScrollbarWidthStr;
  document.getElementById("container_auto_stable_both_edges").style.paddingInlineStart = vScrollbarWidthStr;
  document.getElementById("container_scroll_stable_both_edges").style.paddingInlineStart = vScrollbarWidthStr;
  document.getElementById("container_hidden_stable_both_edges").style.paddingInlineStart = vScrollbarWidthStr;
  document.getElementById("container_hidden_stable_both_edges").style.paddingInlineEnd = vScrollbarWidthStr;
  </script>
</html>