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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [Protocol](./puppeteer.protocol.md) &gt; [BackgroundService](./puppeteer.protocol.backgroundservice.md) &gt; [EventMetadata](./puppeteer.protocol.backgroundservice.eventmetadata.md)

## Protocol.BackgroundService.EventMetadata interface

A key-value pair for additional event information to pass along.

<b>Signature:</b>

```typescript
export interface EventMetadata 
```

## Properties

|  Property | Type | Description |
|  --- | --- | --- |
|  [key](./puppeteer.protocol.backgroundservice.eventmetadata.key.md) | string |  |
|  [value](./puppeteer.protocol.backgroundservice.eventmetadata.value.md) | string |  |