lative" ping="a/relative/ping">relative</a><br />
<a href="/a/absolute" ping="/a/absolute/ping">absolute</a><br />
<a href="ftp://a.example.com/" ping="https://ping.example.com/ping">ftp</a><br />
<a ping="https://ping.first.com/" href="http://b.example.com/">ping first</a><br />

Ignored anchors but picked pings:<br />
<a>no href</a><br />
<a href="mailto:a@example.com" ping="http://ping.example.com/mailping">mailto:</a><br />
<a href="javascript:hello();" ping="http://ping.example.com/jsping">javascript:<