Block-level non-replaced elements in normal flow when ‘overflow’ computes to ‘visible’

This section also applies to block-level non-replaced elements in normal flow when ‘overflow’ does not compute to ‘visible’ but has been propagated to the viewport.

[. . .]

If ‘height’ is ‘auto’,the height depends on whether the element has any block-level children and whether it has padding or borders:

If it only has inline-level children,the height is the distance between the top of the topmost line Box and the bottom of the bottommost line Box.

If it has block-level children,the height is the distance between the top border-edge of the topmost block-level child Box that does not have margins collapsed through it and the bottom border-edge of the bottommost block-level child Box that does not have margins collapsed through it.

[. . . ]

Only children in the normal flow are taken into account (i.e.,floating Boxes and absolutely positioned Boxes are ignored,and relatively positioned Boxes are considered without their offset).

[. . . ]

Block-level,non-replaced elements in normal flow when ‘overflow’ does not compute to ‘visible’ (except if the ‘overflow’ property’s value has been propagated to the viewport).

If ‘height’ is ‘auto’,07001.

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