clientWidth: The width of the element inside the element.
clientHeight: The height of the element inside the element.
offsetWidth: The width of the element including the border.
offsetHeight: The height of the element including the border.
pageXOffset: horizontal scroll position
pageYOffset: vertical scroll position
getBoundingClientRect: A function to get the most precise position of an element on the screen. It returns an object with properties indicating the pixel positions of the sides of the element relative to the top left of the screen. Word of caution - calling getBoundingClientRect causes reflow. More details here