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<head>
  <meta charset="utf-8">
  <title>Array findLast() — last error</title>
</head>
<body>
  <h1>findLast() — most recent error</h1>
  <pre id="out"></pre>
  <script>
    (function () {
      var events = [
        { level: "info", msg: "Server started" },
        { level: "error", msg: "Disk full" },
        { level: "info", msg: "Retry scheduled" },
        { level: "error", msg: "Connection timeout" }
      ];
      var lastError = events.findLast(function (e) {
        return e.level === "error";
      });
      document.getElementById("out").textContent = lastError ? lastError.msg : "";
    })();
  </script>
</body>
</html>

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JavaScript Array findLast() — last error log (Try It)