RTCMultiConnection.send

Send text messages using WebRTC data channels

How to use

connection.send('text-message');

// objects
connection.send({
    a: true,
    b: 1,
    c: 'string',
    e: {
        hello: 'hmm'
    }
});

// file
connection.send(file || blob);

You can receive messages using onmessage event.