Angular broadcast

Using $scope.$emit will fire an event up the $scope. Using $scope.$broadcast will fire an event downthe $scope. Using $scope.$on is how we listen for these events.

 example:
// firing an event upwards
$scope.$emit('myCustomEvent', 'Data to send');
// firing an event downwards
$scope.$broadcast('myCustomEvent',{
  someProp: 'Sending you an Object!' // send whatever you want
});
// listen for the event in the relevant $scope
$scope.$on('myCustomEvent', function (event, data){
  console.log(data); // 'Data to send'
});