NODEJS How to block sending socket.emit on web browser?

Question

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How to block sending socket.emit on browser ?

server

io.on('connection', function (socket) {

  socket.on('singupCheck', function (msg) {
    console.log(msg);
  });
});

Browser console

var socket = io();
socket.emit('singupCheck','test');

Answer 1

I think you can't block emit function on socket.io in the console.

But, for example, you can check data on the Node.js side and then decide what you need to do.

For example:

socket.on('event', (data) => {
    if (!data) {
        throw new Error('Empty data');
    }

    //do something
});

For this case you will secure your event for empty data. Also you can check type of expected data.