Broadcasting can be done at multiple levels.
Socket io rooms example.
For example this socket io chinese document is 2017.
A server that integrates with or mounts on the node js http server socket io.
Rooms in socket io don t need to be created one is created when a socket joins it.
Item 2 is done for you by default by the socket io library and is served on the path socket io socket io js.
For example let us create rooms called room room number and join some clients.
Socket io is composed of two parts.
It s too simple to use a group chat window.
A client library that loads on the browser side socket io client.
For example if two players were in a room and played tic tac toe and i wanted to save game board state.
So that it will be shared with other sockets by reference.
As soon as this room is full create another room and join clients there.
Note we are currently doing this on the default namespace i e.
Socket on create function room socket join room.
This makes it inconvenient for many people who are interested in learning socket io.
This multi room chat example is part 2 in the node js socket io chat series previous chat tutorial what i failed to cover in the previous example was how to send messages broadcast information with socket io.
To broadcast an event to all the clients we can use the io sockets emit.
Socket on create function room socket join room.
Broadcasting means sending a message to all connected clients.
In that case every socket in the room excluding the sender will get the event.
In the code below you can see item 1 being done on the 3rd line.
The following examples assume you define the module.
To leave a channel you call leave in the same fashion as join both methods are asynchronous and accept a callback argument.
By default all websocket connections and resources are served within the socket io path.
You can call the join method on the socket to subscribe the socket to a given channel room.
In the example above a room is created with a name specified in variable room.
A simple example of setting up dynamic rooms for socket io clients to join client js.
They are joined on the server side so you would have to instruct the server using the client.
They are joined on the server side so you would have to instruct the server using the client.
During development socket io serves the client automatically for us as we ll see so for now we only have to install one module.
Rooms in socket io don t need to be created one is created when a socket joins it.
Serve up the socket io js client library as a static resource.
The example on the official website is almost the same as most of the entry level examples on the internet.
We can send the message to all the connected clients to clients on a namespace and clients in a particular room.
