30-seconds-of-code/snippets/get-scroll-position.md

Get scroll position

Use pageXOffset and pageYOffset if they are defined, otherwise scrollLeft and scrollTop. You can omit el to use a default value of window.

const getScrollPos = (el = window) =>
  ( {x: (el.pageXOffset !== undefined) ? el.pageXOffset : el.scrollLeft,
   y: (el.pageYOffset !== undefined) ? el.pageYOffset : el.scrollTop} );
// getScrollPos() -> {x: 0, y: 200}