---
lang: en
title: 'API docs: core.component'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
permalink: /doc/en/lb4/apidocs.core.component.html
---

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[Home](./index.md) &gt; [@loopback/core](./core.md) &gt; [Component](./core.component.md)

## Component interface

A component declares a set of artifacts so that they cane be contributed to an application as a group

<b>Signature:</b>

```typescript
export interface Component 
```

## Properties

|  Property | Type | Description |
|  --- | --- | --- |
|  [bindings](./core.component.bindings.md) | <code>Binding[]</code> | An array of bindings to be aded to the application context. |
|  [classes](./core.component.classes.md) | <code>ClassMap</code> | A map of classes to be bound to the application context. |
|  [controllers](./core.component.controllers.md) | <code>ControllerClass[]</code> | An array of controller classes |
|  [lifeCycleObservers](./core.component.lifecycleobservers.md) | <code>Constructor&lt;LifeCycleObserver&gt;[]</code> |  |
|  [providers](./core.component.providers.md) | <code>ProviderMap</code> | A map of providers to be bound to the application context |
|  [servers](./core.component.servers.md) | <code>{</code><br/><code>        [name: string]: Constructor&lt;Server&gt;;</code><br/><code>    }</code> | A map of name/class pairs for servers |


