HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>.ajaxError() URL filter</title>

  <style>

    body { font-family: sans-serif; padding: 16px; max-width: 560px; }

    button { margin-right: 8px; padding: 8px 12px; cursor: pointer; border-radius: 6px; border: 1px solid #cbd5e1; background: #fff; }

    .log { margin-top: 14px; padding: 12px; background: #fef2f2; border-radius: 6px; font-size: 14px; line-height: 1.5; }

  </style>

</head>

<body>

  <button type="button" id="match">404 on watched URL (logged)</button>

  <button type="button" id="other">404 on other URL (ignored)</button>

  <div class="log">Trigger a matching 404 to see the handler message.</div>

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

  <script>

    var targetUrl = "https://httpbin.org/status/404";



    $(document).ajaxError(function(event, jqXHR, settings, thrownError) {

      if (settings.url === targetUrl) {

        $(".log").text("Filtered match — URL: " + settings.url + " | status: " + jqXHR.status);

      }

    });



    $("#match").on("click", function() {

      $.get(targetUrl);

    });



    $("#other").on("click", function() {

      $.get("https://jsonplaceholder.typicode.com/posts/999999999");

    });

  </script>

</body>

</html>

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jQuery .ajaxError() — filter by settings.url (Try It)