329220 - relatively positioned block expands to contain a nested float

Status: RESOLVED INVALID

(Core :: Layout: Positioned, defect)

Description

[Eira Monstad]

If a float is nested in a relatively positioned block, the block expands to contain the float. This should not happen since the float is not in flow.

Comment 1

[Eira Monstad]

Attachment: Testcase

Comment 2

[Martijn Wargers (dead)]

Isn't this: http://www.w3.org/TR/CSS21/visudet.html#q22
"
10.6.6 Block-level, non-replaced elements in normal flow when 'overflow' does not compute to 'visible'; 'inline-block', non-replaced elements; and floating, non-replaced elements
If 'margin-top', or 'margin-bottom' are 'auto', their used value is 0. If 'height' is 'auto', the height depends on the element's descendants."

http://www.w3.org/TR/CSS21/visudet.html#root-height
"In addition, if the element has any floating descendants whose bottom margin edge is below the bottom, then the height is increased to include those edges. Only floats that are children of the element itself or of descendants in the normal flow are taken into account, e.g., floats inside absolutely positioned descendants or other floats are not."

So it seems to me Mozilla is following the css spec here.

Comment 3

[Hixie (not reading bugmail)]

Ah, Eira, you didn't tell me you had overflow:hidden on that block...

Comment 4

[Eira Monstad]

After re-reading the spec, I agree that this is invalid.