Re: [csswg-drafts] [css-position-3] link to absolute-position containing block (#11239)

At the time of submission, I was not aware of the term "original containing block" as defined in the specification. 
My interpretation of the wording "original containing block" was that it referred to the containing block from which the 'inset-modified containing block' was derived. The use of the word 'however' suggested this interpretation to me, emphasizing that percentage calculations are not performed against the 'inset-modified containing block' but rather the box serving as the reference from which the offsets of the 'inset-modified containing block' were calculated.

I inferred this interpretation directly from the definition in [section 3.5](https://www.w3.org/TR/css-position-3/#abspos-insets):

_"For an absolutely positioned box, the inset properties effectively reduce the containing block into which it is sized and positioned by the specified amounts. The resulting rectangle is called the inset-modified containing block. (For disambiguation, the actual containing block of an absolutely positioned box can also be called the absolute-position containing block.)"_

My understanding was that "actual containing block" is equivalent to "original containing block."

This is why, in the pull request message, I wrote: "In this context, 'the original containing block' is the 'absolute-position containing block.'"

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Received on Friday, 22 November 2024 08:43:21 UTC