动态房间插座。io和节点

I'm trying to use the new "room" feature in Socket.io v.7 to create dynamic chat rooms, but I'm having problems getting static rooms to work in my example. Based on the URL the user selects they should end up in room1 or room2. Anything the user enters in the chat should be broadcast to users in the same room. I have 2 browsers (chrome & ff) each with a tab open to /room1 and /room2, however nothing I type in seems to be broadcast to the other tabs. What am I doing wrong?I'm trying to use the new "room" feature in Soc