var heartbeat,
    ws = new WebSocket(url);
ws.onopen = function(e){
    heartbeat = setInterval(function(){
        ws.send({type:'heartbeat'});
    },3e4);
    plugin.emit('live.onopen', e, heartbeat);
},
    ws.onerror = function(e){
    plugin.emit('live.onerror',JSON.parse(e.data));
},
    ws.onmessage = function(e){
    plugin.emit('live.onmessage',JSON.parse(e.data));
},
    ws.onclose = function(e){
    plugin.emit('live.onclose',e);
};
return ws;