Html viewport is missing height and/or width in non-fixed layout documents

[josteinaj]

Fixed layout publications require height and/or width to be specified in the content documents meta viewport, which I assume is why an error is thrown

This does not seem to be a requirement for publications that are not fixed layout publications. The tools we use currently generate and validate <meta name="viewport" content="width=device-width" />. Could the HTM_047 ("Html viewport is missing height and/or width.") validation throw a warning instead of an error if the content document is not a fixed layout document?

(I'm using 4.0.0-alpha9-SNAPSHOT)

[madevelopers]

I also created a fixed layout epub recently and one of the html files has the following viewport declaration <meta name="viewport" content="width= ,height= ">. This causes the book to shrink when loaded on Kobo for Android. The issue is not present on iBooks and Kobo for iOS. I know this is somewhat off-topic, but I think it would be helpful to have a Warning message for this case.