What is the best way to interact with both the child and parent controllers within a directive?

Question

What is the best way to interact with both the child and parent controllers within a directive?

We currently have two directives known as parent and child. Both of these directives come with controllers that house specific functionalities. In the case of the child directive, there are a couple of ways to access controllers:

We can access the parent controller using the require property (require: '^parent'). This allows us to receive the parent controller as the fourth parameter in our link function with the value:
```
function link(scope, elem, attrs, parentCtrl)
```
We can also access the child controller directly, without the need for using require. In this scenario, the childController will be passed directly as the fourth parameter in the link function.

With that said, how can we reference both the child and parent controllers within the child's link function? You can find an example of this question demonstrated in a Plunker here: http://plnkr.co/edit/WzU6iJgf2zLLApFHeiEG?p=preview

javascript angularjs angularjs-directive

Answer 1

Answer №1

To include both your child directive and parent directive in the 'require' property of your directive definition, you can pass an array containing both directives. In the link function, the 4th parameter will be an array with references to the required directives:

app.directive('childDirective', function() {
    require: ['childDirective', '^parentDirective'],
    link: function(scope, element, attr, ctrls) {
        var childCtrl = ctrls[0];
        var parentCtrl = ctrls[1];
        ...
    }
});

Answer 2

To include both your child directive and parent directive in the 'require' property of your directive definition, you can pass an array containing both directives. In the link function, the 4th parameter will be an array with references to the required directives:

app.directive('childDirective', function() {
    require: ['childDirective', '^parentDirective'],
    link: function(scope, element, attr, ctrls) {
        var childCtrl = ctrls[0];
        var parentCtrl = ctrls[1];
        ...
    }
});

What is the best way to interact with both the child and parent controllers within a directive?

Answer №1

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