External Links Module

https://www.drupal.org/project/extlink

External Links is a small module used to differentiate between internal and external links. Using jQuery, it will find all external links on a page and add an external icon indicating it will take you offsite or a mail icon for mailto: links.

https://talkingdrupal.com/330 ... https://www.youtube.com/watch?v=fAnDYYYdBnI