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

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[Home](./index.md) &gt; [@loopback/context](./context.md) &gt; [Notification](./context.notification.md)

## Notification type

Event data for observer notifications

<b>Signature:</b>

```typescript
export declare type Notification = {
    eventType: ContextEventType;
    binding: Readonly<Binding<unknown>>;
    context: Context;
    observers: Set<ContextEventObserver>;
};
```