net: why net.Socket's property without pid info #20032

const clientList: IClient[] = []
enum MSG_TYPE {
  INIT,
  DATA,
  COMMUNICATE
}

interface IClient {
  id: number | string
  socket: net.Socket
}

const handleClientMsg = (msg, current) => {
  switch (msg.type) {
    case MSG_TYPE.INIT:
      let client = clientList.find(item => item.socket === current)
      if (client) {
        client.id = msg.id
      }
      break
    
    case MSG_TYPE.COMMUNICATE: {
      let client = clientList.find(item => item.id === msg.id)
      if (client) {
        client.socket.write(msg.data)
      } 
    }
      break
    default:
      break
  }
}

server.on('connection', socket => {

  clientList.push({ id: undefined, socket })

  socket.on('data', function (msg) {
    let message = JSON.parse(msg.toString())
    handleClientMsg(message, this)
    console.log(this, this === socket)
    log(chalk.green(clientList.map(item => item.id).toString()))
  })
})