cordova app chrome not defined

[wlzimmer]

I installed the plugin in Cordova with
cordova plugin add https://github.com/MobileChromeApps/cordova-plugin-chrome-apps-sockets-udp

and when the app runs I get a message chrome not defined.

What am I missing?

[wlzimmer]

As a followup, the calls to chrome.sockets... were in a onDeviceReady function; Code as follows

var app = {
sendTo: function (data, addr, port) {
alert ("sendTo");
chrome.sockets.udp.create(function(createInfo) {
chrome.sockets.udp.bind(createInfo.socketId, '0.0.0.0', 0, function(result) {
chrome.sockets.udp.send(createInfo.socketId, data, addr, port, function(result) {
if (result < 0) {
alert('send fail: ' + result);
chrome.sockets.udp.close(createInfo.socketId);
} else {
alert('sendTo: success ' + port);
chrome.sockets.udp.close(createInfo.socketId);
}
});
});
});
},

receiveErrorListener: function (info) {
alert ('RecvError on socket: ' + info.socketId);
chrome.sockets.udp.close(info.socketId);
},

receiveListener: function (info) {
var listItem = document.createElement('li');
var html = '' + info + '';
listItem.innerHTML = html;
deviceList.appendChild(listItem);
chrome.sockets.udp.close(info.socketId);
},

addReceiveListeners: function () {
try{
alert("Add Listeners");
alert (typeof(chrome) == "undefined");
chrome.sockets.udp.onReceiveError.addListener(this.receiveErrorListener);
alert("add listeners 2");
chrome.sockets.udp.onReceive.addListener(this.receiveListener);
} catch(err) {alert(err);}
},

initialize: function() {
    this.bindEvents();
    detailPage.hidden = true;
},

bindEvents: function() {
    alert("bind");
    document.addEventListener('deviceready', this.onDeviceReady, false);
},

onDeviceReady: function() {

alert (typeof(chrome) == "undefined");
alert("ready");
try {
app.addReceiveListeners();
app.sendTo ("Discover,0,", "255.255.255.255", 12345);
alert ("Send Discover");
} catch(err) {alert(err);}
},

onError: function(reason) {
    alert(reason); 
}    

};

[wlzimmer]

Problem fixed by upgrading to Cordova v 6.0