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

<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[Home](./index.md) &gt; [@loopback/core](./core.md) &gt; [LifeCycleObserver](./core.lifecycleobserver.md) &gt; [start](./core.lifecycleobserver.start.md)

## LifeCycleObserver.start() method

The method to be invoked during `start`

<b>Signature:</b>

```typescript
start?(): ValueOrPromise<void>;
```
<b>Returns:</b>

`ValueOrPromise<void>`


