I can't open the link in the new tab when I use angularjs material $mdDialog.confirm()

I guess the problem appears in the callback
The browser will block non-human jumps by default, even if I open a new tab and then location url

$mdDialog.show(confirm).then(function () {
    var url = 'www.google.com';
    var goUrl = window.open();
    goUrl.location = url;
});

https://codepen.io/scheinin/pen/JmvEob