--- sidebar_label: CSSCoverage.(constructor) --- # CSSCoverage.(constructor) Constructs a new instance of the `CSSCoverage` class **Signature:** ```typescript class CSSCoverage { constructor(client: CDPSession); } ``` ## Parameters | Parameter | Type | Description | | --------- | --------------------------------------- | ----------- | | client | [CDPSession](./puppeteer.cdpsession.md) | |