scrollWidth and scrollHeight are Ints not Numbers

[seastian]

https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollWidth

Note: This property will round the value to an integer. If you need a fractional value, use [element.getBoundingClientRect()](https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect).

Not sure if worth a breaking change but I just ran into it when comparing it with width.