auto @mention user just like twitter has on its reply box. Is it possible?
@tushar_vikky It is mentioned above. You'll just need to create a json encoded array with a single element representing the user you'd like pre-populated. If you need to see it in action try editing a comment you made here with a @mention and view the source for the id_map.
Yes, you just pre-populate the hidden field with the userid in the format above and pre-populate the textarea with the visual representation of the mention.