An alternative method to modifying the scope value without relying on $watch

I have been implementing a custom directive

<users stats="stats"></users>

Whenever the scope object is changed in the main controller, the directive's scope value is also updated.

app.directive('users', function(){
    var directive = {};
    directive.restrict = "E";
    directive.templateUrl = "templates/partials/users_stats.html";
    directive.scope = {stats:'='};
    directive.controller = "userStatsCtrl"
    return directive;
});

Within the directive controller, I have implemented some functions like:

app.controller("userStatsCtrl", function($scope){
    $scope.$watch('stats', function(newValue) {
      if (angular.isDefined(newValue)) {
        .....
      }
    });
})

Currently, I am using $watch to monitor the scope changes. However, I would like to update the scope value without relying on scope.$watch.

My question is, how can I achieve this - updating the scope value without using scope.$watch?

Answer №1

Whenever the value of "scope.stats" is modified in your primary controller, you have the ability to broadcast an event and handle it within your directive to perform any desired operations. Here is a sample code snippet for broadcasting an event:

$scope.$broadcast('customEventName');

To receive and respond to the event within your directive, you can use the following code:

$scope.$on('customEventName', function(){

});

Answer №2

Have you considered attempting this:

<user-info data="userInfo" ng-change="updateUserInfo($event)"></user-info>
                           or
<user-info data="userInfo" ng-blur="updateUserInfo($event)"></user-info>

then, in the controller:

$scope.updateUserInfo = function(event) {
    //do something with event
}

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