JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <div id="text">
    </div>
    <button id="btn">
        Click to open window
    </button>
<body>

JavaScript

$(document).ready(function(){
    
    if(window.opener){
        $("#text").text("Has opener");
    }else{
        $("#text").text("No opener");
    }
    
    $("#btn").click(function(){
        window.open("http://fiddle.jshell.net/8c2e4/10/show/");
    });
});