HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>change handler</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 400px; }
    label { display: block; margin-bottom: 6px; font-weight: 600; }
    .target { width: 100%; padding: 10px 12px; border: 2px solid #3b82f6; border-radius: 6px; font-size: 16px; box-sizing: border-box; margin-bottom: 14px; }
    #hint { color: #64748b; font-size: 14px; margin-top: 8px; }
  </style>
</head>
<body>
  <label for="text">Text input (.target)</label>
  <input type="text" class="target" id="text" value="Option 1">
  <label for="select">Select (.target)</label>
  <select class="target" id="select">
    <option>Option 1</option>
    <option>Option 2</option>
  </select>
  <p id="hint">Edit text and tab away, or pick Option 2 — change fires when value differs.</p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $(".target").on("change", function() {
      alert("Handler for change called.");
    });
  </script>
</body>
</html>

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jQuery change event — bind handler on .target (Try It)