Exactly, and you can't simply set a left margin because the scrollbar width is different in every OS. This is what bootstrap does: https://github.com/twbs/boots

Exactly, and you can't simply set a left margin because the scrollbar width is different in every OS. This is what bootstrap does: https://github.com/twbs/bootstrap/blob/83bfff7f0765503b990b96c303eef67009e48d77/js/modal.js#L277 https://github.com/twbs/bootstrap/blob/83bfff7f0765503b990b9...