It is a relative URI. Add http://
to make it an absolute URI:
<a href="http://www.yahoo.com" target="_blank">Here</a>
Pergunta
I have a simple tag which has a url as its href, when I click on it, it appends the URL to the current address.
The address is www.example.com/event/
<a href="www.yahoo.com" taget="_blank">Here</a>
When I click on it, it will change to following
www.example.com/event/www.yahoo.com
Solução
It is a relative URI. Add http://
to make it an absolute URI:
<a href="http://www.yahoo.com" target="_blank">Here</a>