JSFiddle - React, Tailwind, and code Playground

HTML

<a id="openNewWindow" href="#">Open New Window</a>
<br />
<a id="getReferenceToExistingWindow" href="#">Get Reference To Existing Window and Close it!</a>

JavaScript

var windowName = "windowName";

$("#openNewWindow").click(function() {
    window.open("http://www.stackoverflow.com", windowName);
});

$("#getReferenceToExistingWindow").click(function() {
    var existingWindow = window.open(null, windowName);
    existingWindow.close();
});