Can you explain the difference between a directive and a factory in AngularJS?
AngularJS > AngularJS Introduction > MVC architecture
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Answer:
Can you explain the difference between a directive and a factory in AngularJS?
In AngularJS, directives are used to extend the HTML vocabulary, while factories are used to create services.
Directives are used to create custom HTML elements and attributes. They can be used to add behavior to existing elements, or to create new elements. Directives are created using the "directive" function, and can be used in HTML templates by adding them as attributes to elements.
Factories, on the other hand, are used to create services. Services are singleton objects that can be used to share data and behavior between different parts of an application. They can be created using the "factory" function, and can be injected into controllers and other services using dependency injection.
In summary, directives are used to add behavior to HTML elements, while factories are used to create services that can be shared throughout the application. While directives and factories can be used to accomplish similar tasks, they are typically used in different ways, and are intended to solve different problems.
| Directive | Factory |
|---|---|
| Directives are used to extend HTML by creating custom elements and attributes. | Factories are used to create objects and return them. |
| Directives are used to add behavior to an existing DOM element. | Factories are used to create reusable service objects for an application. |
| Directives are used to create reusable UI components. | Factories are used to create complex objects with multiple methods and properties. |
| Directives are invoked when the compiler encounters them in the DOM. | Factories are invoked when they are injected into a controller, service, or other object. |
| Directives are used to create custom HTML elements and attributes. | Factories are used to create objects that can be shared across different parts of an application. |
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