Tips for transferring objects between AngularJS directives

Is it possible to access an object named foo that is defined/instantiated inside the link function of directive A from the link function of another separate directive?

Answer №1

Quote from documentation:

Prior to the pre-linking phase, the controller is instantiated and shared with other directives via the require attribute. This allows for communication between directives and enhancement of each other's functionality.

Essentially, in order to share data between two directives on the same object or its children, you must expose 'foo' within directive A's controller, injected using the require option in directive B.

The structure of the directives would be like this:

.directive("dirA", function () {
    return {
        controller: function ($scope, $element, $attrs) {

        },
        link: function ($scope, $element, $attrs, controller) {
            controller.foo = $attrs.dirA;
        }
    }
})
.directive("dirB", function () {
    return {
        link: function ($scope, $el, $attr, controller) {
            $scope.shared = controller.foo;
        },
        require: "dirA"
    }
})

Check out a working example here.

Answer №2

Due to my limited reputation, I am unable to leave a comment, so I will include it in this response instead.

Here is some extra information for individuals who are facing the same challenge. The outcome may vary based on the placement of the directives in relation to one another.

If the ^ prefix is used, the directive will search for the controller among its parent elements (without the ^ prefix, the directive would only look within its own element).

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