HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>word-break in code blocks</title>
  <style>
    body {
      font-family: system-ui, sans-serif;
      padding: 1.5rem;
      line-height: 1.5;
      color: #334155;
      background: #0f172a;
    }

    h1 { color: #e2e8f0; font-size: 1.125rem; }

    .code {
      max-width: 14rem;
      padding: 0.85rem 1rem;
      border-radius: 0.35rem;
      background: #1e293b;
      border: 1px solid #334155;
      font-family: ui-monospace, monospace;
      font-size: 0.8125rem;
      color: #93c5fd;
      margin-bottom: 0.75rem;
    }

    .normal { word-break: normal; overflow-x: auto; }
    .break-all { word-break: break-all; }

    .label {
      color: #94a3b8;
      font-size: 0.75rem;
      margin-bottom: 0.35rem;
    }
  </style>
</head>
<body>
  <h1>Long token wrapping</h1>
  <p class="label">normal (may overflow)</p>
  <pre class="code normal">const token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9";</pre>
  <p class="label">break-all</p>
  <pre class="code break-all">const token = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9";</pre>
</body>
</html>

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CSS word-break Property - Code and Hash Strings