"Visually Hidden Table Headers" post does not use a table

[aardrian]

The post here: https://www.accessibility-developer-guide.com/examples/tables/hidden-headers/

Does not use an HTML <table>. It uses <div>s with an ARIA grid role. These are not equivalent.

Issue #306 discusses the differences so I won't wade into it here.

This pattern should be re-created with an HTML <table> and hidden until then.