# ElementComponentSystem

Class · extends [`ComponentSystem`](https://api.playcanvas.com/engine/classes/ComponentSystem.md) · category: User Interface

Source: https://github.com/playcanvas/engine/blob/970d89f6d3bc6667f4e1f88153abd6e7e82ed52c/src/framework/components/element/system.js#L43

Manages the [ElementComponent](https://api.playcanvas.com/engine/classes/ElementComponent.md)s of an application. Reach it through `app.systems.element`;
components are created with [Entity#addComponent](https://api.playcanvas.com/engine/classes/Entity.md#addcomponent), never by calling the system directly.

## Inherited from [ComponentSystem](https://api.playcanvas.com/engine/classes/ComponentSystem.md)

- `fire(name: string, arg1?: any, arg2?: any, arg3?: any, arg4?: any, arg5?: any, arg6?: any, arg7?: any, arg8?: any): EventHandler`
- `hasEvent(name: string): boolean`
- `off(name?: string, callback?: HandleEventCallback, scope?: any): EventHandler`
- `on(name: string, callback: HandleEventCallback, scope?: any): EventHandle`
- `once(name: string, callback: HandleEventCallback, scope?: any): EventHandle`