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<html><head><script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script><script>$(document).ready(function(){ $("p").on("custom.someNamespace",function(event){ alert(event.namespace); }); $("p").click(function(event){ $(this).trigger("custom.someNamespace"); }); $("button").click(function(){ $("p").off("custom.someNamespace"); });}); </script></head><body><p>Click on this paragraph.</p><button>Remove namespace</button></body></html>