HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Lodash _.once args</title>
</head>
<body>
  <h1>Arguments only on first call</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      var summarize = _.once(function (label, value) {
        return { label: label, value: value };
      });
      var first = summarize("first", 1);
      var second = summarize("ignored", 99);
      document.getElementById("out").textContent = JSON.stringify({
        first: first,
        second: second,
        sameReference: first === second
      }, null, 2);
    })();
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

Lodash _.once — later arguments ignored (Try It)