Chapter 5: Building an event bus

HTML

<script src="https://code.angularjs.org/1.3.2/angular.min.js"></script>
<div ng-app="myApp">
    <div ng-controller="Ctrl">
        <button ng-click="generateEvent()">Generate event</button>
    </div>
    <div my-dir></div>
</div>

JavaScript

angular.module('myApp',[])
.controller('Ctrl',function($scope, $rootScope, $log) {
    $scope.generateEvent = function() {
        $rootScope.$emit('busEvent');
    };
    
    var unbind = $rootScope.$on('busEvent', function() {
        $log.log('Handler called!');
    });
    

    $scope.$on('$destroy', unbind);

})
.directive('myDir',function($rootScope, $log) {
    return {
        scope: {},
        link: function(scope, el, attrs) {
            var unbind = $rootScope.$on('busEvent', function() {
                $log.log('Handler called!');
            });

            scope.$on('$destroy', unbind);
        }
    };
});