Hello Dan,
You can do something like this,it should work.i dont know how you are doing , but i hope the any one of below approaches will surely work for you
window.open('https://some URL', '_blank' );
//and blank will allow to open in new window
or use location.href, if nothing works for you let me know the exact scenario , how are you doing the things
Hope its clear to you!!
Regards
D