<https://w3schools.invisionzone.com/topic/21304-how-to-create-chatting-window/>
<http://schema.org/text>
"how to create a chatting window for one-to-one chat like gmail that appears on right hand side to the bottom with following option-minimize-popup-close-add smiley-block user-group chat-go off the record same like gmail .........so please tell me the code............................... "
<https://w3schools.invisionzone.com/topic/21304-how-to-create-chatting-window/?tab=comments#comment-118434>