HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <title>aspect-ratio ignored when both sizes are set</title>
  <style>
    body {
      font-family: Arial, sans-serif;
      margin: 16px;
      color: #0f172a;
    }

    p {
      margin: 0 0 12px;
      max-width: 40rem;
      line-height: 1.5;
    }

    .row {
      display: flex;
      flex-wrap: wrap;
      align-items: flex-start;
      gap: 12px;
    }

    .label {
      margin: 0 0 8px;
      font-weight: 700;
    }

    .box {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 160px;
      background: #1d4ed8;
      color: #fff;
      font-weight: 700;
    }

    .free { aspect-ratio: 1 / 1; }
    .locked {
      height: 64px;
      background: #0f766e;
      aspect-ratio: 16 / 9;
    }
  </style>
</head>
<body>
  <p>The first box has only a width, so <strong>1 / 1</strong> sets the height. The second also has <strong>height: 64px</strong>, so <strong>16 / 9</strong> does not change the used size.</p>
  <div class="row">
    <div>
      <p class="label">aspect-ratio: 1 / 1</p>
      <div class="box free">1 / 1</div>
    </div>
    <div>
      <p class="label">height: 64px and 16 / 9</p>
      <div class="box locked">Locked</div>
    </div>
  </div>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

CSS aspect-ratio Property — both sizes set