Re: [spec-reviews] CSSOM View document.scrollingElement (#51)

@zcorpan,
> It seems to me that your line of reasoning is that the window is equivalent to "the viewport"

from what I understand this is almost exact, a more elaborate wording to describe that could be:

in a desktop browser, showing an non styled document, the `window` is equivalent to the `document.defaultView` which is the default document viewport ("porthole").

In mobile browsers having vendor supplied UA stylesheet, or in desktop browsers having user supplied stylesheet, the supplied style may affect and define the number of currently available viewports ("portholes"). This may be achieved through the `overflow`, `width`, and `height` CSS properties and their values.

To summarize ... there may be more than one viewport for an HTML document, though there is only one `defaultView`.


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