AngularJS directive and customized markup/function

Here is the code snippet I am currently working with:

<body ng-controller="testController">
    <div test-directive transform="transform()">
    </div>


    <script type="text/ng-template" id="testDirective.html">
        <div>
            <p>
                {{transform()}}
            </p>
        </div>
    </script>

    <script>
        angular.module("Test", [])
        .directive("testDirective", function() {
            return {
                templateUrl: "testDirective.html",
                scope: {
                    transform: "&"
                },
                link: function(scope) {

                }
            };
        })
        .controller("testController", function($scope) {
            $scope.transform = function() {
                return "<a ng-click='somethingInController()'>Do Something</a>";
            };

            $scope.somethingInController = function() {
                alert("Good!");
            };
        });
    </script>

</body>

I have successfully created a directive with a method that can be called from the controller. The method manipulates values passed to it, although in this example it does not receive any values. However, my next goal is to create an element that will call a method in the controller without knowing what kind of element it will be or what method it will call. Is there any way to achieve this?

Fiddle Example:

http://jsfiddle.net/abrahamsustaita/C57Ft/0/ - Version 0

http://jsfiddle.net/abrahamsustaita/C57Ft/1/ - Version 1

FIDDLE EXAMPLE WORKING

http://jsfiddle.net/abrahamsustaita/C57Ft/2/ - Version 2

Version 2 is now functional, although I am unsure if this is the most efficient way to achieve the desired result. However, I am facing difficulties in executing the method in the parent controller.

Answer №1

Absolutely. Nevertheless, there are a couple of issues with the code you provided. Let's begin by addressing your inquiry.

<test-directive transform='mycustommethod'></test-directive>

// transform in the directive scope will point to mycustommethod
angular.module('app').directive('testDirective', function() {
    return {
        restrict: 'E',
        scope: {
            transform: '&'
        }
    }
});

The main problem here is that when printing the HTML, the output will have escaped characters like &lt; instead of < (and so on). One possible solution is to use ng-bind-html, but it won't bind the returned HTML. You will have to manually inject the HTML (you can utilize jQuery for this) within your link method and make use of

var compiled = $compile(html)(scope)
to bind the result. Lastly, invoke ele.after(compiled) or ele.replace(compiled) to integrate it into your webpage.

Answer №2

At last, I have managed to make it function properly.

The solution is a combination of steps. Initially, I had to include an additional directive to parse the specific element I desired:

.directive("tableAppendElement", function ($compile) {
    return {
        restrict: "E",
        replace: true,
        link: function(scope, element, attrs) {
            var el = angular.element("<span />");
            el.append(attrs.element);
            $compile(el)(scope);
            element.append(el);
        }
    }
})

This directive accepts the element/text to be appended and then connects it to the scope.

Nevertheless, an issue persisted. How could I access the controller's scope? Given that my directive would be utilized by numerous controllers and rely on each controller's model, I decided to simply set scope: false. With this adjustment, every method within the controller became accessible from the directive :D

Check out the working fiddle here. This approach also proved beneficial as it eliminated the need to pass the transform method, allowing the controller to handle that task as well.

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