JSFiddle - React, Tailwind, and code Playground

HTML

<button id="btn1">BTN1</button>
<button id="btn2">BTN2</button>
<button id="remove">CLEAR
    </button

JavaScript

var testFxn = function () {
    $('#btn2').click(function () {
        alert('I clicked btn2');
    });
}
var tVar = null;
jQuery(document).ready(function () {

    $('#btn1').click(function () {
        clearTimeout(tVar);
       
        tVar = setTimeout(function () {
            $('#btn2').click(function () {
                alert('I clicked btn2');
            });
        }, 0);
    });
});