HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>.serialize() submit</title>

  <style>

    body { font-family: sans-serif; padding: 16px; max-width: 520px; }

    label { display: block; margin-bottom: 8px; font-size: 14px; }

    input, textarea { width: 100%; padding: 6px 8px; box-sizing: border-box; margin-top: 2px; }

    button { margin-top: 10px; padding: 8px 14px; cursor: pointer; background: #2563eb; color: #fff; border: none; border-radius: 6px; }

    .log { margin-top: 14px; padding: 12px; background: #eff6ff; border-radius: 6px; font-size: 13px; word-break: break-all; }

  </style>

</head>

<body>

  <form id="contact-form" action="/api/contact">

    <label>Name <input type="text" name="name" value="Jane"></label>

    <label>Email <input type="email" name="email" value="jane@example.com"></label>

    <label>Message <textarea name="message">Hello from .serialize()</textarea></label>

    <button type="submit">Submit (Ajax preview)</button>

  </form>

  <div class="log" id="output">Submit to see serialized string.</div>

  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>

  <script>

    $("#contact-form").on("submit", function(event) {

      event.preventDefault();

      $("#output").text($(this).serialize());

    });

  </script>

</body>

</html>

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jQuery .serialize() — form submit handler (Try It)