puppeteer/website/versioned_docs/version-10.1.0/puppeteer.csscoverage._onstylesheet.md

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[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [CSSCoverage](./puppeteer.csscoverage.md) &gt; [\_onStyleSheet](./puppeteer.csscoverage._onstylesheet.md)

## CSSCoverage.\_onStyleSheet() method

<b>Signature:</b>

```typescript
_onStyleSheet(event: Protocol.CSS.StyleSheetAddedEvent): Promise<void>;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  event | Protocol.CSS.StyleSheetAddedEvent |  |

<b>Returns:</b>

Promise&lt;void&gt;