puppeteer/website/versioned_docs/version-9.1.1/puppeteer.csscoverage._onstylesheet.md
2021-08-10 11:09:48 +01:00

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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;