套接字。io发出适当回调?

Recently I have been messing around with socket.io and found this interesting thing, that I can have emit function callback like this.

最近我一直在摆弄插座。io发现了一个有趣的东西，我可以像这样发出函数回调。

I start emitting on client side like this:

我开始在客户端发出这样的信号:

client.emit('eventToEmit', dataToEmit, function(error, message){
    console.log(error);
    console.log(message);
});

Then I can fire a callback from server-side like this:

然后我可以从服务器端发起回调，如下所示:

client.on('eventToEmit', function(data, callback){
    console.log(data);
    callback('error', 'message');
});

Everything works fine with no errors, but I am interested if doing something like this is appropriate since I have not seen anything similar in the documentation or any example so far.

一切工作正常，没有错误，但我对这样做是否合适感兴趣，因为到目前为止我还没有在文档或任何示例中看到类似的内容。

1 个解决方案

#1

It's perfectly legal.

这是完全合法的。

Those callbacks are called 'acknowledgement functions' and are summarily mentioned in the Wiki and described a bit more in detail on the NPM page ('Getting acknowledgements').

这些回调称为“确认函数”，在Wiki中有简要的介绍，在NPM页面上有更详细的描述(“获取确认”)。

EDIT: more recent documentation can be found here.

编辑:更多最新的文档可以在这里找到。

#1