io function


### io functions
|Title|
|:-:|
|[io.emit](https://texonom.com/ioemit-718042a143f34b97b3513e023184d6b1)|
|[io.in](https://texonom.com/ioin-616cac6a904442c381d17bd2ec371b6a)|
|[io.to(id)](https://texonom.com/iotoid-cf1baf660d9b452fba662ca838e333c3)|
|[io.of](https://texonom.com/ioof-6465a83961044db6b715ab9d70b05f9e)|


### room




