Is there any demo of adding hint to <a href....>..</a>? In desktop browser, I can see the hover events can trigger the hints. How to make it work on touch brow

Is there any demo of adding hint to <a href....>..</a>? In desktop browser, I can see the hover events can trigger the hints. How to make it work on touch browser? Touch should trigger the <a href>, but I also like to see hints shows up somehow.