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

<!DOCTYPE html>
<html>
  <meta charset="utf-8">
  <title>CSS Overflow: 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/">
  <link rel="help" href="https://drafts.csswg.org/css-overflow-4/#scrollbar-gutter-property">
  <link rel="match" href="scrollbar-gutter-002-ref.html">

  <style>
  .line {
    display: flex;
  }

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

    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; scrollbar-gutter: stable">
      <div class="content"></div>
    </div>

    <div class="container" style="overflow-y: scroll; scrollbar-gutter: stable">
      <div class="content"></div>
    </div>

    <div class="container" style="overflow-y: hidden; scrollbar-gutter: stable">
      <div class="content"></div>
    </div>
  </div>

  <div class="line">
    <div class="container" style="overflow-y: auto; scrollbar-gutter: stable both-edges">
      <div class="content"></div>
    </div>

    <div class="container" style="overflow-y: scroll; scrollbar-gutter: stable both-edges">
      <div class="content"></div>
    </div>

    <div class="container" style="overflow-y: hidden; scrollbar-gutter: stable both-edges">
      <div class="content"></div>
    </div>
  </div>
</html>