Abstract/Concrete Inheritance Model in AngularJS

In a previous post I showed how to create a “classic” inheritance model in AngularJS using directives. This time I will show another inheritance model: the abstract/concrete.

In OOP, an abstract class cannot be instantiated, it serves only to provide common properties and functionality to child classes. In Angular, we have to make an analogy and define that an abstract directive is one that does not have a template or a link function, only a controller. The template is provided by child directives.

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Directive Inheritance in AngularJS

Inheritance is a powerful way to extend directives functionality and at the same time, improve code reuse. Lets see how it works in Angular with a simple example. The first step is to create a directive called “outer” which is going to be our top-level directive in our hierarchy.

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