IonicCordovaNetwork.js

var myApp = angular.module('myApp').service('CordovaNetwork', ['$ionicPlatform', '$q', function($ionicPlatform, $q) {
  // Get Cordova's global Connection object or emulate a smilar one
  var Connection = window.Connection || {
    "CELL"     : "cellular",
    "CELL_2G"  : "2g",
    "CELL_3G"  : "3g",
    "CELL_4G"  : "4g",
    "ETHERNET" : "ethernet",
    "NONE"     : "none",
    "UNKNOWN"  : "unknown",
    "WIFI"     : "wifi"
  };

  var asyncGetConnection = function () {
    var q = $q.defer();
    $ionicPlatform.ready(function () {
      if(navigator.connection) {
        q.resolve(navigator.connection);
      } else {
        q.reject('navigator.connection is not defined');
      }
    });
    return q.promise;
  };

  return {
    isOnline: function () {
      return asyncGetConnection().then(function(networkConnection) {
        var isConnected = false;

        switch (networkConnection.type) {
          case Connection.ETHERNET:
          case Connection.WIFI:
          case Connection.CELL_2G:
          case Connection.CELL_3G:
          case Connection.CELL_4G:
          case Connection.CELL:
            isConnected = true;
            break;
        }
        return isConnected;
      });
    }
  };
}]);



myApp.controller('AppCtrl', function(CordovaNetwork){
  CordovaNetwork.isOnline().then(function(isConnected) {
    alert(isConnected);
  }).catch(function(err){
    console.log(err);
  });
});