Utilize TypeScript to access scope within a directive

Is there a way to access the controller's scope properties using my custom TypeScript directive?
For example, in this snippet below, I am trying to retrieve and log scope.message:

/// <reference path="typings/angularjs/angular.d.ts" />

        //module
        module app {
            var mainModule = angular.module('mainModule', []);
        }

        //controller
        module app.testCtrl {
            interface ITest {
                message: string;
            }

            class TestCtrl implements ITest {
                message: string = 'initial value'; // This is the specific value I am aiming to access from within my directive
            }
            angular.module('mainModule').controller('testCtrl', TestCtrl);
        }

        //directive
        module app.directives {
            export class MyDirective implements ng.IDirective {
                restrict = 'A';

                static instance(): ng.IDirective {
                    return new MyDirective;
                }

                link(scope: ng.IScope) {
                    //How do I navigate to the scope properties?
                    //console.log(scope.???);
                }

            }
            angular.module('mainModule').directive('myDirective', MyDirective.instance);
        }
    

P.S - I am utilizing the "controller as" syntax on the view; does that affect anything?

Answer №1

It appears that you may be misusing angular's directives. To access the controller's scope variables, try the following method:

link(scope: ng.IScope) {
    console.log(scope["myControllerAsAlias"].message);
}

Alternatively, the preferred 'angular way' would be to pass the variable to the directive like this:

interface IMyDirectiveScope extends ng.IScope {
    message: string
}

export class MyDirective implements ng.IDirective {
    restrict = 'A';
    scope = {
        message: "@"
    };

    static instance(): ng.IDirective {
        return new MyDirective;
    }

    link(scope: IMyDirectiveScope) {
        console.log(scope.message);
    }

}

Then in your HTML file, use the directive as follows:

<div my-directive message="myCtrlAsAlias.message"></div>

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