Maybe the distinguishing factor is whether the thing (scroll bar, in your example) is visible when the user is idling (I.e. not interacting with the page). As a preliminary condition: If it disappears when interaction stops, it's non-counted overlay. If it stays (such as the browser toolbar in mobile browsers), it's counted overlay and taken into account with the `dv*` units. What do you think? -- GitHub Notification of comment by brunoais Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/6026#issuecomment-881242242 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-configReceived on Friday, 16 July 2021 07:36:48 UTC
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