HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>proxy namespace unbind</title>
  <style>
    body { font-family: sans-serif; padding: 16px; }
    button { padding: 10px 18px; cursor: pointer; margin-right: 8px; }
    #log { margin-top: 14px; color: #be123c; font-weight: bold; }
  </style>
</head>
<body>
  <button type="button" id="run">Run handlers</button>
  <button type="button" id="off-a">.off("click.a")</button>
  <button type="button" id="off-b">.off("click.b")</button>
  <div id="log">Bind two proxied handlers with namespaces click.a and click.b.</div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    var a = { label: "A", handle: function() { $("#log").append(" [A]"); } };
    var b = { label: "B", handle: function() { $("#log").append(" [B]"); } };
    $("#run")
      .on("click.a", $.proxy(a.handle, a))
      .on("click.b", $.proxy(b.handle, b));
    $("#off-a").on("click", function() {
      $("#run").off("click.a");
      $("#log").text("Removed click.a — only [B] remains.");
    });
    $("#off-b").on("click", function() {
      $("#run").off("click.b");
      $("#log").text("Removed click.b — only [A] remains.");
    });
    $("#run").on("click.run", function() {
      $("#log").text("Clicked:");
    });
  </script>
</body>
</html>

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jQuery.proxy() — unbind with event namespaces (Try It)