@loopback/docs/site/apidocs/boot.lifecycleobserverbooter.app.md

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---
lang: en
title: 'API docs: boot.lifecycleobserverbooter.app'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/loopbackio/loopback-next/tree/master/packages/boot
permalink: /doc/en/lb4/apidocs.boot.lifecycleobserverbooter.app.html
---

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[Home](./index.md) &gt; [@loopback/boot](./boot.md) &gt; [LifeCycleObserverBooter](./boot.lifecycleobserverbooter.md) &gt; [app](./boot.lifecycleobserverbooter.app.md)

## LifeCycleObserverBooter.app property

<b>Signature:</b>

```typescript
app: Application;
```