Incorporating ng-click functionality within a custom directive

I am trying to create an AngularJS directive that wraps content containing ng-click, but the resulting button does not respond when clicked. Here is a simplified version of the code I attempted:

(HTML)

<div ng-app="someapp">
    <div ng-controller="Ctrl1">
        <h2>Example</h2>
        <my-dir data-x="1">
            <button ng-click="refresh()" id="refresh1">Refresh</button>
        </my-dir>
        <my-dir data-x="2">
            <button ng-click="refresh()" id="refresh2">Refresh</button>
        </my-dir>
    </div>
</div>

(JavaScript)

var app = angular.module('someapp', []);

app.controller('Ctrl1', function($scope){ });

app.directive('myDir', function(){
    return {
        restrict: 'E',
        scope: {},
        template: '<div><p>Directive contents:</p><div ng-transclude></div></div>',
        transclude: true,
        link: function(scope, element, attrs){
            $scope.y = attrs.x+1;
            scope.refresh = function(){
                console.log("Refresh Called, y = ", $scope.y);
            }
        }
    };
});

How can I modify the code so that clicking the button triggers the $scope.refresh() function?

Additional Information:

I require local object details for the directive (as there may be multiple instances within one controller), hence the creation of a new scope.

Answer №1

When considering the transcluded ng-click, it's important to note that it will be bound to the controller's scope rather than the directive's. Depending on your needs, this behavior may or may not be desired. Personally, I would suggest declaring the method on the controller's scope instead of the directive's.

app.controller('Ctrl1', function($scope){ 
    $scope.refresh = function() {
        console.log("Refresh called.");
    };
});

In situations like this, it is recommended for the directive to declare an isolate scope, even if it is empty.

An alternative suggestion based on your comment is to include the button in the directive template for a more straightforward association with the correct scope.

If flexibility is needed regarding the presence of the refresh button, consider exposing that as an option through the directive attribute:

<my-dir show-button='true'></my-dir>

// directive scope
scope: {
    showButton: '='
} 

The issue with using two-way binding for 'true' and 'false' expressions can be a drawback in some cases.

Regarding the concept of a "refresh" button, it might be worth reassessing whether it is truly necessary in an Angular environment which excels at dynamic updates without manual refreshes.

A provided plunkr demonstrates a potential approach to managing the situation, particularly when dealing with reusable controls within directives:

http://plnkr.co/edit/FhrSwcrSZScvCfhtCSjn

In this example, the child button directives are contained within the "videoPlayer" directive, each having their logic but being separate entities from the parent directive. The parent exposes an API for the children to utilize. It's noteworthy that the methods of the parent are part of the constructor, not the scope.

For further reference, consult the angular documentation here:

http://docs.angularjs.org/guide/directive (last example on the page)

Each videoPlayer directive retains its own isolate scope.

Answer №2

Take out the scope object as there appears to be a conflict with it.

Snippet from Creating a Directive that Wraps Other Elements

The transclude option alters how scopes are nested. It ensures that the contents of a transcluded directive inherit the scope of the outermost directive rather than its own inner scope. This allows the contents to access the external scope.

app.directive('myDir', function(){
    return {
        restrict: 'E',
        //scope: {}, remove this line.
        template: '<div><p>Directive contents:</p><div ng-transclude></div></div>',
        transclude: true,
        link: function(scope, element, attrs){
            console.log("X-attr", attrs.x);
            scope.refresh = function(){
                console.log("Refresh Called");
            }
        }
    };
});

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