Occasionally I stick funny things in my link attributes just to see if anyone would pick up on it, no one does. After John tweet this, he had to then come back and clarify, as to not set some SEOs off ...

An HTML reference names a file for the browser to display. When a browser reads a reference, it displays the referenced file as if it were part of the file that it is ...

Google's John Mueller said that data-href attributes are not links and thus do not pass link signals or PageRank. If you want it to pass link signals then use simple href link attributes. He said this ...