Searching for a directive's data within a controller: Tips for updating it efficiently

I'm just starting out with AngularJS and struggling to find the answer to my question. I really want to refactor my app in an MVC way before it turns into a tangled mess :)

Currently, I have a directive that shows the number of users in groups who are currently logged in. Here is an example:

angular.module('dashboard').directive('indicator',
    function($scope) {
        var directive = {
            restrict: 'E',
            scope: { free: '=' },
            template: '<div><h3>Free<h3><span>{{free}}</span></div>'
        };
        return directive;
    });

This number updates instantly when there is a change (using SignalR). The JSON response from the server looks like this:

{ 
  groupId: 123,
  loggedIn: 12,
  onPause: 2,
  total: 20
}

My goal is to locate the directive that displays data for a specific group ID and update its scope object accordingly. What would be the best approach to achieve this?

javascriptangularjs

Answer №1

<indicator free="freeVal"></indicator>

When you input the following code in your view:

$scope.freeVal = 25;

And include it in your controller, you will see 'Free25' displayed.

Any updates made to $scope.freeVal will automatically reflect in the displayed value.

Therefore, there is no need to manually update the scope value from the directive - simply pass the scope value to the directive (free="freeVal") and any changes in the data will be reflected instantly in the view and directive.

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