JSFiddle - React, Tailwind, and code Playground

HTML

<button id="pb" type="button">Pop up blocked</button>
<button id="pnb" type="button">Pop up not blocked</button>

JavaScript

$(function() {
    $('#pnb').click(function() { openWin() });
    $('#pb').click(function() { ajaxAndOpenWin() });
})
    
var openWin = function() {
    window.open('#anchor', '_blank');
    win.focus();
}

var ajaxAndOpenWin = function() {
    $.ajax({
            url: '#anchor',
            type: 'POST'
        }).done(function (result) {
            openWin();
    }); 
}