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    must always --> it's not a must, it will simply be easier Commented Feb 19, 2019 at 20:45
  • From the MDN >> The element is removed from the normal document flow, and no space is created for the element in the page layout. It is positioned relative to its closest positioned ancestor, if any; otherwise, it is placed relative to the initial containing block. Its final position is determined by the values of top, right, bottom, and left. This is what I cannot understand why I need to use the offsets Commented Feb 19, 2019 at 22:07