socket.io 引发错误

Question

I've created an Express app (with Angular) that uses socket.io for real-time communication. How can I return an error from the server to the client within the socket.on() function?

Here's my code:

io.on('connection', (socket: Socket) => {
    socket.on('create game', () => {
        if(condition) {
            // Want to throw error here
        }
    });
});

Answer 1

You could use a built-in event that socket.io already provides called Connect_failed

Here you have more information about Error Handling if you need it, hope it helps!