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<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>event bus emit</title>

</head>

<body>

  <h1>Custom event bus</h1>

  <pre id="out"></pre>

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

  <script>

    (function () {

      var lines = [];

      var EventBus = (function () {

        var onData = $.Callbacks();

        return {

          subscribe: function (fn) { onData.add(fn); },

          emit: function (payload) {

            if (!onData.disabled()) { onData.fire(payload); }

          }

        };

      })();



      EventBus.subscribe(function (data) {

        lines.push("Received: " + data.id + " " + data.value);

      });

      EventBus.emit({ id: 42, value: "temperature" });



      document.getElementById("out").textContent = lines.join("\n");

    })();

  </script>

</body>

</html>

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jQuery callbacks.fire() — event bus (Try It)