# ComponentSystem

Class · extends [`EventHandler`](https://api.playcanvas.com/engine/classes/EventHandler.md) · category: Framework

Source: https://github.com/playcanvas/engine/blob/f059dc005842f76e052cdf44d8370c8c7ec475ac/src/framework/components/system.js#L21

Component Systems contain the logic and functionality to update all Components of a particular
type.

## Constructors

### constructor

```ts
new ComponentSystem(app: AppBase)
```

Create a new ComponentSystem instance.

**Parameters**

- `app` ([`AppBase`](https://api.playcanvas.com/engine/classes/AppBase.md)): The application managing this system.

## Properties

### id

```ts
readonly id: string
```

The id type of the ComponentSystem.

## Inherited from [EventHandler](https://api.playcanvas.com/engine/classes/EventHandler.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`