Ajax implementation on a web page

1)- [login to view URL] , There is already a working Webrtc meeting system. There are the following two points need to be done. 2)- When a meeting is created from this page ( [login to view URL] ) , after creating new meeting, if meeting's link is closed, then it doesn't let it open again and shows error ([login to view URL] ) like this room is already created. I want same meeting should open if it's open again with the same meeting link 3)- It's asking for Mic and Camera permission on join meeting but I want only Mic permission.