小编Seb*_*nH2的帖子

我正在使用react、node.js 和socket.io 构建一个聊天应用程序。

我有以下用于连接和断开连接的钩子

useEffect(() => {
        const { name, room } = queryString.parse(location.search)
        socket = io(ENDPOINT)

        setRoom(room)

        // New user joins room
        socket.emit('join', { name, room }, (userNamesPresent, error) => {
            setUsersPresent(userNamesPresent.userNamesPresent)
        })

        return () => {
            // User leaves room
            socket.emit('disconnect')

            socket.off()
        }
    }, [ENDPOINT, location.search])

我像这样在节点中处理它

io.on("connection", socket => {
    socket.on("join", ({ name, room }, callback) => {
        const { error, user } = addUser({id: socket.id, name, room})
    if(error) {
        return callback({error})
    }
    // Emitting a welcome …