let size: number = -1

export function getScrollbarSize(recalculate: boolean = false): number {
  if (size === -1 || recalculate) {
    const div = document.createElement('div')
    const style = div.style

    style.width = '50px'
    style.height = '50px'
    style.overflow = 'scroll'

    document.body.appendChild(div)

    size = div.offsetWidth - div.clientWidth

    document.body.removeChild(div)
  }

  return size
}

export function setScrollbarSizeForTests(value: number) {
  size = value
}