JSFiddle - React, Tailwind, and code Playground

HTML

<button id="clickme">Click Me</button>

JavaScript

$(document).ready(function(){
        $("#clickme").click(function() {
            var win = window.open("http://www.google.com","_blank", 'width=800,height=600');
        
            function checkIfWinClosed(intervalID){
                if(win.closed){
                    alert('windowsClosed');
                    clearInterval(intervalID);
                }
            }
            var interval = setInterval(function(){
                checkIfWinClosed(interval);
            },1000);
    });
    
});