HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>set attr object</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 420px; text-align: center; }
    img { padding: 10px; max-width: 120px; }
    #out { color: #dc2626; font-size: 20px; font-weight: 600; margin-top: 8px; }
  </style>
</head>
<body>
  <img id="logo" alt="placeholder">
  <div id="out"></div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("#logo").attr({
      src: "https://via.placeholder.com/120/2563eb/ffffff?text=jQ",
      title: "jQuery",
      alt: "jQuery Logo"
    });
    $("#out").text($("#logo").attr("alt"));
  </script>
</body>
</html>

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jQuery .attr() — set object on img (Try It)