The element is removed from the normal document flow
No space is created for the element in the page layout
The element is positioned relative to its closest positioned ancestor (if any)
or to
the initial containing block
Its final position is determined by the values of top,
right, bottom, and left
An absolutely positioned element is positioned relative to its nearest
positioned ancestor (i.e., the nearest ancestor that is not static)
If a positioned ancestor doesn't exist, it is positioned relative to the ICB
(initial containing block), which is the containing block of the document's root
element
If the element has position: absolute, the containing block is
established by the nearest ancestor with a position
of absolute, relative or fixed
(W3C)
