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WCAG SC 1.4.10 (Reflow) and sticky headers


From: Steve Green
Date: Feb 24, 2020 12:55AM

I am testing WCAG SC 1.4.10 (Reflow) on a website that has a sticky header. The content reflows ok in terms of the width, but at 400% zoom and 1280px width the content is truncated at window heights below 780px. The cut-off content cannot be accessed because sticky headers cannot be scrolled.

This is obviously an accessibility issue, but it does not appear to violate any WCAG success criteria. SC 1.4.10 makes no mention of window height except in the context of pages that are designed to scroll horizontally, which is not the case here.

Have I missed something, or is this an apparent oversight in the success criterion?

Steve Green
Managing Director
Test Partners Ltd
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