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<html lang=en>

<head>

  <meta charset=UTF-8>

  <meta name=viewport content="width=device-width,initial-scale=1">

  <title>onpaste — digits only</title>

  <style>body{font-family:system-ui,sans-serif;margin:0;padding:1.5rem;background:#f8fafc;color:#334155;line-height:1.7}h1{margin:0 0 .75rem;font-size:1.25rem;color:#0f172a}input{width:100%;max-width:320px;padding:.5rem .75rem;border:1px solid #cbd5e1;border-radius:8px;font-size:.875rem;margin-bottom:.75rem}#hint{padding:.75rem 1rem;background:#fef3c7;border:1px solid #fde68a;border-radius:8px;font-size:.875rem;max-width:420px;color:#92400e}</style>

</head>

<body>

  <h1>Digits-only paste</h1>

  <p>Try pasting "(555) 123-4567" — only digits remain.</p>

  <input id=phone onpaste=digitsOnlyPaste(event) placeholder="Phone number">

  <div id=hint>Non-digits are stripped on paste.</div>



  <script>function digitsOnlyPaste(t){t.preventDefault();var a=t.clipboardData.getData("text");t.target.value=a.replace(/\D/g,"")}</script>

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HTML onpaste Attribute — Digits only