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[cssom-view] Clarify definition of scrolling box #1540

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[cssom-view] Clarify definition of scrolling box #1540

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5 changes: 3 additions & 2 deletions cssom-view/Overview.bs
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Expand Up @@ -125,8 +125,9 @@ HTML.
<dfn>Content edge</dfn>, <dfn>padding edge</dfn>, <dfn>border edge</dfn>, <dfn>margin edge</dfn>, and <dfn>viewport</dfn> are defined by CSS.
<!-- These *should* just link to CSS2.1, but it doesn't have actual anchors to link to, because it's THE WORST. -->

Elements and <a>viewports</a> have an associated <dfn>scrolling box</dfn> if has a scrolling mechanism<!--XXX xref--> or it overflows
its content area<!--XXX xref--> and the used value of the 'overflow-x' or 'overflow-y' property is ''overflow/hidden''. [[!CSS3-BOX]]
An element or <a>viewport</a> has an associated <dfn>scrolling box</dfn> if it has a <a>scroll
container</a> and <a>scrollable overflow</a>. This box is the same as the <a>scrollport</a>.
[[!CSS-OVERFLOW-3]]

An element <var>body</var> (which will be <a>the HTML <code>body</code> element</a>) is
<dfn>potentially scrollable</dfn> if all of the following conditions are true:
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