HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>CSS word-break Example</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      padding: 1.5rem;
      line-height: 1.5;
      color: #334155;
      background: #f8fafc;
    }

    .demo {
      width: 200px;
      padding: 0.65rem 0.75rem;
      margin-bottom: 1rem;
      border: 1px solid #cbd5e1;
      border-radius: 0.35rem;
      background: #fff;
    }

    .label {
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.04em;
      color: #64748b;
      margin-bottom: 0.35rem;
    }

    .normal { word-break: normal; }
    .break-all { word-break: break-all; }
    .keep-all { word-break: keep-all; }
    .break-word { word-break: break-word; }
  </style>
</head>
<body>
  <h1>word-break Property Examples</h1>
  <div class="demo">
    <div class="label">normal</div>
    <div class="normal">Thisisaverylongwordthatshouldn'tbreak.</div>
  </div>
  <div class="demo">
    <div class="label">break-all</div>
    <div class="break-all">Thisisaverylongwordthatshouldn'tbreak.</div>
  </div>
  <div class="demo">
    <div class="label">keep-all</div>
    <div class="keep-all">這是一個非常長的詞，應該不會斷開。</div>
  </div>
  <div class="demo">
    <div class="label">break-word</div>
    <div class="break-word">Thisisaverylongwordthatshouldn'tbreak.</div>
  </div>
</body>
</html>

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CSS word-break Property - All Values