HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>error on #book</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 420px; }
    #book { max-width: 200px; border: 2px solid #ef4444; border-radius: 8px; display: block; margin-bottom: 12px; }
    #out { color: #b91c1c; font-weight: bold; }
  </style>
</head>
<body>
  <p>Broken image loads after the handler is attached:</p>
  <img id="book" alt="Book cover" width="200" height="120">
  <div id="out">Waiting for error event…</div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("#book")
      .on("error", function() {
        $("#out").text("Handler for error called.");
        alert("Handler for error called.");
      })
      .attr("src", "https://httpstat.us/404");
  </script>
</body>
</html>

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jQuery error event — #book missing image (Try It)