peconn.github.io/fullscreen.html at master · PEConn/peconn.github.io · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0, viewport-fit=cover">
  <title>WebView v149 Viewport Regression Repro</title>
  <style>
    html, body {
      margin: 0;
      padding: 0;
      width: 100%;
      height: 100%;
    }

    /* Container attempting to cover 100 dynamic viewport height plus bottom safe area */
    .app-container {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-sizing: border-box;

      /* Regression trigger: 100dvh combined with safe-area-inset-bottom */
      height: 100dvh;
      padding-bottom: env(safe-area-inset-bottom, 0px);

      background-color: #1c1c1e;
      color: #ffffff;
      font-family: system-ui, -apple-system, sans-serif;
    }

    .header {
      padding: 20px;
      background-color: #0071e3;
      text-align: center;
      font-weight: bold;
    }

    .content {
      padding: 20px;
      text-align: center;
    }

    /* Bottom fixed/pinned element that gets clipped or miscalculated */
    .bottom-bar {
      padding: 16px;
      background-color: #ff3b30;
      text-align: center;
      font-weight: bold;
    }
  </style>
</head>
<body>

  <div class="app-container">
    <div class="header">
      Top Header
    </div>

    <div class="content">
      <h2>WebView v149 Viewport Repro</h2>
      <p>In WebView v149.0.7827.160, combining <code>100dvh</code> with <code>env(safe-area-inset-bottom)</code> causes the bottom element to clip or calculate height incorrectly behind the Android system navigation bar.</p>
    </div>

    <div class="bottom-bar">
      BOTTOM ACTION BAR (This element gets clipped/cut off)
    </div>
  </div>

</body>
</html>