JSFiddle - React, Tailwind, and code Playground

HTML

<a onkeyup="f();">adf</a><br/>
<a >adf</a><br/>
<a onkeyup="f();">adf</a><br/>
<a >adf</a><br/>
<a id="myid">Тест на навешиваемое событие</a>

JavaScript

myLive("#myid", "keyup", function(){f();});
$("a:not([onkeyup])").filter(
    function() { return $(this).data("hasLiveEvent") == undefined; }
).html("ok");
function myLive(filter, event, func){
    $(filter).data("hasLiveEvent", true);
    $(filter).on(event, func);
};