[en] Patterns

Good afternoon,

You might consider adding an explanation page with a CodePen example of two additional patterns for https://www.w3.org/WAI/ARIA/apg/patterns/ as these are common, can be used on every page, and should be accessible.

  1.  The skip to main content link used on the page.
  2.  The back to top button link that appears when scrolling down the page..

Thanks,
Russell