In Javascript, when I use window.open("", "", "width=250, height=250")
, the popup window is not actually sized at 250x250.
The best way to see this clearly is to compare against a div
with width and height at 250x250 and simply drag the popup next to the div to see that it's not the same size.
https://cdpn.io/ianhd/debug/KKvqgve/yYMyLaQmoeLk
What am I missing?