HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>isError — catch guard</title>
</head>
<body>
  <h1>Catch guard</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    function describe(err) {
      if (_.isError(err)) {
        return err.name + ": " + err.message;
      }
      return "non-error: " + String(err);
    }
    document.getElementById("out").textContent =
      describe(new TypeError("x is not a function")) + "\n" +
      describe("boom");
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

Lodash _.isError — catch guard (Try It)