@loopback/docs
Version:
Documentation for LoopBack 4
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Markdown
lang: en
title: 'API docs: extension-health.healthbindings.health_checker'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
editurl: https://github.com/strongloop/loopback-next/tree/master/extensions/health
permalink: /doc/en/lb4/apidocs.extension-health.healthbindings.health_checker.html
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[Home](./index.md) > [@loopback/extension-health](./extension-health.md) > [HealthBindings](./extension-health.healthbindings.md) > [HEALTH\_CHECKER](./extension-health.healthbindings.health_checker.md)
## HealthBindings.HEALTH\_CHECKER variable
<b>Signature:</b>
```typescript
HEALTH_CHECKER: BindingKey<HealthChecker>
```