Wondering for CSS purposes if the scroll bar is included in the viewport width? Specifically I'm thinking about calculating the sizes for img srcset. For example, would I need to account for it by subtracting like this, where the 17px is the scroll bar:
sizes="(min-width: 38em) calc(50vw-17px), calc(100vw-17px)"
I mean it's not like 17px will make any difference in the image the browser picks, but just wondering.