index.html

<html>
    <head>
        <title>Example Break</title>
        <script src="break.js"></script>
        <style>
        textarea{
            width: 75%;
            height: 75%;
        }
        </style>
    </head>
    <body>
        <textarea id="cmd">
var req = new BreakRequest("https://echo.websocket.org");
req.on('message', function(msg){
    console.log(msg.data);
});
req.on('error', function(e){
    console.error(e);
})
req.on('close', function(e){
    console.warn("Server closed ! : "+e);
});
req.on('open', function(response){
    if(response){
        console.info(response); //JSON
    }
    alert("Connected: "+req.connected+" to "+req.correctURL);
    req.send('Connection effectued');
});
//req.listen(3000);
req.connect();
        </textarea>
        <button onclick="javascript:test()">Run</button>
    </body>
    <script>
        function test(){
            let c = document.getElementById('cmd').value;
            eval(c);
        }
    </script>
</html>