Example of how to use the user.js file in tty.js, to do something somewhat useful. This appends the io.socket transport type into the help text. I use this to know whether I've got websockets actually working on any given day.

tty.js-static-user.js

if (window.tty) {                                                               
    tty.on('open', function() {                                                 
        var tty = window.tty;                                                   
        window.tty.socket.on('connect', function() {                            
            console.log('connect ',window.tty.socket.socket.transport.name);    
            document.getElementById('help').innerHTML += "<p>" + window.tty.socket.socket.transport.name;                                                       
        });                                                                     
    });                                                                         
}