putContent.js

export function putContent(el: HTMLElement, currentPosition: string, isOpen: boolean): string {
  let height = el.offsetHeight
  var rect = el.getBoundingClientRect()
  var elemTop = (isOpen ? rect.top : rect.top - height)
  var elemBottom = (isOpen ? rect.bottom : rect.bottom + height)

  if (elemTop <= 0) { return 'below' }
  if (elemBottom >= window.innerHeight) { return 'above' }
  return (isOpen ? currentPosition : 'below')
}