HTML Code

<!DOCTYPE html>

<html lang=en>

<head>

  <meta charset=UTF-8>

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

  <title>value — form example</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 1rem;font-size:1.25rem;color:#0f172a}label{display:block;margin-top:.75rem;font-weight:600;font-size:.875rem}input[type=email],input[type=text]{display:block;width:100%;max-width:20rem;margin-top:.25rem;padding:.45rem .6rem;border:1px solid #cbd5e1;border-radius:6px;font:inherit}input[type=submit]{margin-top:1rem;padding:.45rem .85rem;background:#2563eb;color:#fff;border:none;border-radius:6px;cursor:pointer;font:inherit}.hint{font-size:.8125rem;color:#64748b;margin-top:.75rem}</style>

</head>

<body>

  <h1>value on form controls</h1>



  <form onsubmit='event.preventDefault(),alert("Form preview only")'>

    <label for=username>Username:</label>

    <input id=username name=username value=JohnDoe>



    <label for=email>Email:</label>

    <input type=email id=email name=email value=john.doe@example.com>



    <label>

      <input type=checkbox id=subscribe name=subscribe value=yes checked>

      Subscribe to newsletter

    </label>



    <input type=submit value=Submit>

  </form>



  <p class=hint>Text/email <code>value</code> pre-fills the field. Checkbox <code>value="yes"</code> is sent when checked.</p>

</body>

</html>

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HTML value Attribute — form defaults