css/css-flexbox/gap-003-lr.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Flexbox Test: gap - lr rows and columns</title>
<link rel="author" title="Adam Argyle" href="mailto:argyle@google.com">
<link rel="help" href="https://www.w3.org/TR/css-grid-1/#gutters">
<link rel="help" href="https://www.w3.org/TR/css-align-3/#column-row-gap">
<link rel="help" href="https://www.w3.org/TR/css-align-3/#gap-legacy">
<link rel="match" href="gap-003-lr-ref.html">
<meta name="assert" content="The 'gap' property enables putting space exclusively between items">
<style>
  body {
    writing-mode: vertical-lr;
  }

  section {
    background-color: green;
    block-size: 100px;
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    flex-direction: column;
  }
  section > div{
    background-color: grey;
    width: calc(50% - 10px);
  }
</style>
<body>
  <p>Test passes if there are <strong> green lines between boxes</strong>.</p>
  <section>
    <div></div>
    <div></div>
    <div></div>
    <div></div>
  </section>
</body>