HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>isPlainObject — options</title>
</head>
<body>
  <h1>Guard options before merge</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    function mergeOptions(defaults, options) {
      if (!_.isPlainObject(options)) {
        return defaults;
      }
      return _.assign({}, defaults, options);
    }
    document.getElementById("out").textContent = [
      JSON.stringify(mergeOptions({ a: 1 }, { a: 2 })),
      JSON.stringify(mergeOptions({ a: 1 }, [9])),
      JSON.stringify(mergeOptions({ a: 1 }, null))
    ].join("\n");
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

Lodash _.isPlainObject — options guard (Try It)